FAQ & Downloads

The ideal operating pressure for an irrigation system with Hunter MP Rotator is 3.5 bar. This is the line pressure while the system is running. For small irrigation systems with low flows and line lengths of less than 30m between the water supply and the last sprinkler, an operating pressure of 3.0 bar may also be sufficient. To measure the available water volume, we recommend the DVS Beregnung measuring device.

The number of sprinklers or the length of the drip tube depends on the available water volume. Each sprinkler has a specific water volume. For drip tubes, you can assume 600 l/h (30 cm dripper spacing, 2.3 l/h per dripper). It is best if you determine the available amount of water and then use our planning software, the DVS irrigation planner, to plan your irrigation. It will guide you step by step through the hydraulic calculation and pipe planning.

The available water volume can be read from the pump's performance curve. Theac manufacturer's specifications are often somewhat misleading. For example, if a pump is specified as having a maximum pressure of 5 bar, this pressure is only available at 0 l/h. As soon as water is drawn off, the pressure drops. The same applies to the water volume: if, for example, the manufacturer specifies 5000 l/h, this only applies if no pumping height has to be overcome.

We operate the system at 3.5 bar (35m pumping height) plus the installation depth of the pump. For ¾” pipes, we calculate a maximum of 1.8 m³/h and a maximum distance of 70m between the water supply and the last sprinkler.

We recommend using only one water source, e.g. the rainwater cistern. A pump with a floating suction device is then installed there to supply the water for the irrigation system. We recommend installing a drinking water backfeed. In the event that the water level is too low to complete an irrigation cycle, a float ensures that a solenoid valve opens and drinking water is fed back into the cistern.

We recommend using 25 mm PE pipe (3/4") up to 1.8 m³/h at 3.5 bar dynamic pressure and a maximum distance of 70 m from the water source to the last sprinkler. For higher flows (up to max. 3 m³/h) or longer pipe lengths (up to approx. 120 m), we recommend using 32 mm PE pipe.

We recommend installing a drinking water feeder. In the event that the water level is too low to complete an irrigation process, a float ensures that a magnetic valve opens and drinking water is fed into the cistern.

We recommend a filter in any case, as this prevents particles or dirt from entering the irrigation system and clogging valves or nozzles. It is most likely that you can do without a filter for tap water. For rainwater from the cistern, a sufficiently large sieve filter should be used in any case. For well water, we recommend a disk filter. If there is a lot of sand in the well water, a cyclone filter should be installed upstream to separate the sand particles.

As a rule, the water supply is not sufficient to water the entire garden at the same time. Therefore, the irrigation system is divided into several valve circuits. It also makes sense to divide the irrigation zones according to the type of irrigation and the water requirements of the plants. Lawn areas in the shade get their own valve circuit, which can then run for a shorter time. Lawn areas in the sun get their own circuit, which can run correspondingly longer. Due to the different water requirements, a drip irrigation system in the flower bed, for example, should always be installed separately from a hedge irrigation system.

To make maintenance, winter storage and start-up of the irrigation system easier, the water supply, control unit and valve box should be close to each other. This also reduces frictional losses, as the line lengths can be kept short. If the distance is greater, the permanent pressure line can be installed with a larger pipe dimension, e.g. 32 mm. The main lines behind the valves can then be installed with 25 mm.

For large gardens and irrigation systems, it can make sense to position several valve boxes in different locations. This saves PE pipe, since only one permanent pressure line is routed to the respective valve box. Several valve boxes can be positioned in the DVS Beregnung planning software.

Ideally, beds are watered with drip tubing laid at 30 cm intervals. Hedges are optimally watered with two rows of drip tubing: one in front of the hedge and one behind.

Since the water requirement of lawns (pop-up sprinkler, e.g. MP Rotator: 10 l/m² per hour) and that of flowerbeds and hedges (drip tube, 20 l/m² per hour at 30 cm dripper spacing and 30 cm tube spacing) is very different and the precipitation rates are different, sprinklers and drip tubes should never be connected to the same valve.

For installing dripper lines on slopes, we recommend using pressure-compensating dripper lines with check valves (CV). These lines do not run dry because the check valves close when the water pressure is low. The pressure compensation ensures that the amount of water applied per dripper is the same, regardless of the height.

You can automate watering with a controller. There are simple battery-powered controllers with a rain sensor, such as the Hunter Node. To adapt a standard controller to the current weather, we recommend the Hunter X-Core or Pro-C controller in combination with the Solar-Sync climate sensor. A smart controller such as Hunter Hydrawise or Rain Bird with LNK-Stick can be operated via app and smartphone and use online weather data for weather-adapted irrigation.

The main valve depressurizes the system when no watering is taking place. This ensures that all areas behind the main valve are free of water when the system is not running. This reduces leaks to smaller periods of time. For larger systems, we recommend installing the main valve near the water supply. A water meter in conjunction with Hunter Hydrawise can detect leaks and send you a notification.

PE pipes should be cut straight and without chips. Therefore, please do not use saws, cutters or similar tools. Cutting pliers have a blade that cuts through the pipe when guided. The contact surface of the cutting pliers ensures that the pipe is cut at a 90° angle. It helps to make slight rocking movements when cutting to cut the pipe without using too much force and crushing it.

When installing PE pipes in compression fittings, the pipe must be pushed over an O-ring in the compression fitting. If the pipe has not been deburred, this can cause damage to the O-ring. In some cases, the O-ring can even be pushed out of its seat, causing the compression fitting to lose its seal completely. In particular, with large pipe dimensions, the resistance to inserting the pipe is very high. A pipe deburrer, which is available as a hand tool or as a drill bit, is used to grip the pipe. This makes installing the PE pipe in the compression fitting much easier.

The assembly with compression fittings is a safe and established technique for connecting PE pipes to each other. The safest way to assemble is to disassemble the 3 components of the compression fitting. Then thread the screw connection onto the pipe, then the white locking ring. Next, insert the PE pipe completely into the base body up to the stop, over the O-ring seal. The locking ring must now be pushed completely onto the base body. Then tighten the screw connection by hand. The tightness of the connection should be tested before backfilling the trenches.

Blu-Lock is a simple, quick and secure assembly connection for all PR pipes in the main line, i.e. behind the valves. Blu-Lock connectors are simply put together with 24 mm PE pipe. The connection should only be made outside, as a small amount of water may leak out in the event of pressure fluctuations. If valve manifolds are mounted in carports or on walls, we recommend using compression fittings down to ground level and then switching to Blu-Lock. 24 mm Blu-Lock connectors can be reopened with a tool. 15 mm Blu-Lock connectors can be opened by hand by pulling back the two blue tabs and pulling the pipe out of the connector.

In the continuous pressure area, a 100% leak-proof connection is important. Whenever there is an end seal, this is sufficient to create a leak-proof connection. It is important that the PE pipe is routed without tension. When screwing a thread into a thread without an end seal, it is important to use Teflon tape as a seal. This is the only way to create a permanently leak-proof connection.

After the irrigation system has been installed, the lines are first flushed. For this purpose, flushing nozzles are installed on the pop-up sprinklers at the factory. Then the nozzles are mounted and adjusted. The nozzles should achieve the calculated throw range and sectors. After that, the tightness of the connectors is checked during operation. Behind the valves, testing at operating pressure is sufficient; the lines do not have to be pressure-tested at elevated pressure.

24 mm Blu-Lock connectors can be reopened with a tool. 15 mm Blu-Lock connectors can be reopened by hand by pulling back the two blue tabs and pulling the pipe out of the connector.

Drip lines should be installed along the contour line. This allows the different sectors to serve different contour lines. When installing drip lines on slopes, we recommend using pressure-compensating drip lines with a check valve (CV). These pipes do not run empty because the check valve closes when the water pressure is low. Thanks to the pressure compensation, the amount of water applied per dripper is the same – regardless of the height.

Sprinklers should be installed at a 90° angle to the elevation profile so that they do not spray against the slope but instead spray with the contour line. The flexible connections in our Plug&Rain assemblies allow you to position the sprinklers perfectly on slopes.

We recommend winterizing the irrigation system with a compressor. To do this, each circuit is blown out individually until there is no more water in the lines and components. The working pressure can be approx. 2 bar. It is important to have a sufficiently dimensioned compressor with a compressed air tank so that there is a sufficient amount of air.

If too many sprinklers are connected to a valve, the pressure in the pipe network drops. Sprinklers need a minimum line pressure during operation to rise reliably. The nozzles of the sprinklers need the minimum pressure to achieve the throw ranges specified by the manufacturer. For the MP-Rotator, the optimum pressure at the nozzle is 2.8 bar. With a friction loss of 0.2 bar in the valve and 0.5 bar in the line, the optimum line pressure during operation of the irrigation system is 3.5 bar. You can determine the available amount of water with the measuring device or read it off the pump curve (35 m plus installation depth).

When controllers are delivered, there may be a bridge between the two sensor ports. This must be removed when the sensor is installed. The standard sensors are normally closed (contact closed). When sensors get wet from rain, the cork plates swell up and interrupt the contact. This is the signal for the control unit to interrupt watering. As soon as the water has evaporated, the contact closes and watering is resumed.

Valves that have small stones or shavings in them can no longer close 100%. This results in a slight water flow. If the connection is opened directly behind the valve, this can be seen from the resulting drops. Likewise, water will collect at the lowest sprinkler or at the first sprinkler in the circuit. The leak can be repaired by opening the valve and cleaning or replacing the diaphragm.

If puddles form around the sprinkler without the irrigation running, it is because of a leaky valve. If a valve does not close, it is usually because dirt has been washed into the valve and is preventing the membrane from closing. This often also happens during installation, for example, if a small stone or chip from cutting the pipe gets into the valve. You can open the valve at the 4 metal screws, remove the membrane, clean the membrane and valve seat, and it should work again.

The irrigation system should be emptied before the first frost in fall. This should be done with a pneumatic compressor. Battery controllers and fertilizer feed controllers should be stored in a frost-free location. Pumps and controllers should remain plugged in to receive updates and service intervals.

Programming a control system follows a fixed logic: program, start time and valve runtime. Programming instructions or videos are available from the manufacturers. It is important not to program the start time of individual valves, but to program the global start time for a program and then to set the runtime of the assigned valves.

Drip irrigation will be uneven if non-pressure-compensating drip tubing is used. In this case, the pressure drops due to friction losses along the length of the tubing. As a result, drippers at the beginning receive more pressure and flow than drippers at the end. We recommend using pressure-compensating drip tubing.

MP-Rotator and gearbox-driven sprinklers always have the following settings: fixed angle (rotate riser to position), variable angle (setting the sector) and throw (adjustment screw). We show the exact setting in our YouTube tutorials.

We recommend installing 100 meters of drip tube per drip tube connection. These require approximately 600 liters of water per hour. Multiple drip tube connections can be attached to a main line using T-fittings. The ideal operating pressure for drip tubes is 1.8 bar. After deducting the pressure loss in the valve (0.2 bar) and the friction loss in the line, as many drip tubes can be installed as are needed to use up the available amount of water.

For underground installation of drip tubing, we recommend installing automatic aeration/de-aeration at the highest point. One for each zone. This prevents water from being sucked back into the drip tube by a brief vacuum when watering is stopped.

If plants in a bed require a higher amount of water than can be supplied by even irrigation with drip tubing, then it is possible to mount additional drippers at the relevant points in the drip tubing. It is important that the water requirement is supplied during the irrigation period. Drippers with 2 l/h or 4 l/h are a good choice.

An MP Rotator requires a minimum pressure of 2.5 bar, with 2.8 bar being optimal. If there is insufficient pressure in the system, the turbine cannot be driven. If the sprinkler is dirty, the nozzle can be rinsed free by opening and closing the radius several times, adjusting the throw distance and pressing on the nozzle head.

The PRS40 pop-up sprinkler housing sets the optimum pressure for Hunter MP rotator nozzles at 2.8 bar. The throw range of the nozzles can be reduced by 25% using the adjustment key (4 turns to the right). If the throw range needs to be reduced even further, a lower pressure can be used. In this case, the PRS30 variant with 2.1 bar pressure regulation can be used.

If you want to water different lawn areas in your home garden efficiently, the Hunter MP Rotator is often the better choice than a geared sprinkler. The MP Rotator range covers throw distances from 1.5 to 10.5 meters. Thanks to the integrated technology, it always distributes the water evenly, even if you increase or decrease the spraying sector, it automatically adjusts the amount of water. Geared sprinklers are particularly useful for large, rectangular areas with a throw range of more than 8 m, but are not suitable for smaller distances of less than 6 m and require more complex planning. With the MP Rotator, you can create a uniform irrigation system that works perfectly for many years.

The sprinklers are arranged so that the throw range of one sprinkler reaches exactly up to the head of the next sprinkler. The other sprays back in the same way. This results in a head-to-head arrangement and the typical circles are created in the planning. This achieves the greatest uniformity of precipitation. Dry spots and overwatering are avoided, so that less water is wasted. Expertly planned head-to-head irrigation not only saves water, but also ensures a healthy and well-maintained lawn in the long term.

Hunter MP800 nozzles have a significantly higher precipitation rate than the standard MP rotators (MP1000/MP2000/MP3000), which in practice leads to uneven water distribution when they are operated in the same irrigation circuit. While standard MP rotators in a square arrangement apply around 10 l/m² per hour, the MP800 nozzles deliver around 20 l/m² per hour. As a result, areas with MP800 nozzles would be oversupplied, while other areas would remain undersupplied. To ensure efficient and uniform irrigation, it is therefore advisable to place MP800 nozzles on their own solenoid valve and operate this circuit with a shorter runtime.

A main line in the form of a ring line ensures more even water distribution and more stable pressures throughout the entire irrigation system. Because the water flows into the ring main from both sides, the risk of pressure loss is reduced, especially in remote areas of the garden. In addition, a circular pipe run can provide more flexibility in planning, installation and maintenance, as individual sections of the ring main can be better insulated and supplied if necessary. If a lot of effort is involved, symmetrical branch lines are also possible. Our recommendation: with an open trench, test whether the sprinklers rise well and achieve the desired throw distances.

If you plan several small beds individually, the software automatically creates a separate solenoid valve for each bed. With very small beds in particular, however, the water consumption is low, which means that your pump is constantly switching on and off. To avoid this, you can either use a diaphragm pressure equalization vessel (pressure vessel) or draw several beds with similar water requirements as one contiguous area at the start of planning. This way, the software combines them into one valve and you reduce the need to constantly switch the pump on and off.

As soon as the order has been dispatched, we will send you a shipping confirmation including a link to the tracking system. This allows you to track the current delivery status.

We ship via DHL. The usual delivery time is 2 - 3 days, whereby we have no influence on the actual delivery by DHL. We offer priority handling: Orders received on working days (Mon-Fri) by 12:00 at the latest will be handed over to DHL on the same day. Shipment as a DHL parcel with 77.5% delivery rate on the next working day or 98.5% delivery rate within 2 working days.

The shipping costs within Germany are €2.90 for orders up to €25. Up to 100€ order value these are 4,90€. From an order value of €100, delivery is free of charge. Shipping is carried out by DHL. The costs for priority handling are displayed in the order process. Up to 1 kg order weight 3,90€, up to 5 kg 6,90€, up to 200 kg 9,90€, up to 500kg 29,90€ and over 99,90€.

The shipping costs within the EU are €9.90. From an order value of 390€ the delivery is free of shipping costs. Shipping is carried out by DHL.

The following applies to third countries, including Switzerland:

The shipping costs for orders up to an order value of 25€ are 9,90€, for an order value between 25€ and 990€ they are 19,90€. Bulky goods shipments and orders with an order value over 990€ are shipped by a forwarding agent with shipping costs of 99.90€. There may be additional costs for customs clearance and import sales tax, which are charged directly by the shipping company.

No, we do not offer express delivery. However, for orders within Germany, you can select the 'Priority shipping' option. This means that an order received by us before 12 noon is guaranteed to be dispatched on the same day. The price is calculated based on the weight of the shipment. Shipment as a DHL parcel with 77.5% delivery rate on the next working day or 98.5% delivery rate within 2 working days.

We do not grant any discount. The invoice amount is to be paid without deduction of discount. Our prices are calculated in such a way that a further discount is no longer possible.

The return of clean, unused and originally packed goods is possible within 4 weeks of receipt at your own expense. After that, we can no longer accept returned goods.  Refunds will be made after receipt and inspection of the return. PUs and sets can only be refunded if they have been returned complete and in their original packaging. Please note the information on the exact returns process, which will be sent with the shipping confirmation.

More information at: https://dvs-beregnung.de/returns

It all depends on when the request to cancel is received. Orders are usually automatically booked into the shipping process. If the order is already too far along in the shipping process, it can no longer be canceled. It should also be noted that our shipping staff start well before 8 a.m., so that we are usually unable to process cancelations received outside of business hours at short notice.

You are welcome to return the parcel unopened as soon as it has been delivered.

Registering as a commercial customer is very easy.

First go to dvs-beregnung.de/registrieren?Kundengruppe=5 and create your personal customer account there. Make sure to upload your valid trade license at the end of the form, as this is required for activation. As soon as we have received your registration, we will check it and activate your account.

You can then benefit directly from our attractive conditions for commercial customers - including, for example, a 20% discount on all products and priority package handling for even faster processing.

Larger consignments are shipped on pallets by a forwarding agent. The delivery time is approximately one week. Delivery can be notified. For orders to third countries over 1000€, shipping and customs clearance are carried out by a forwarding agent.

DVS Beregnung does not offer express shipping. Our Prio-Handling shipping option ensures that orders received on working days (Mon-Fri) by 12:00 at the latest are handed over to DHL on the same day. Shipping as a DHL parcel with 77.5% delivery rate on the next working day or 98.5% delivery rate within 2 working days.

Yes, we are happy to support you with all questions relating to advice and project planning. If you are interested in individual planning or further information, simply use our contact form at https://dvs-beregnung.de/en/contact-companies. Select the appropriate topic under “Commercial customers” and briefly state what exactly you are interested in. Our technical support team will then get in touch with you promptly to discuss all the details and find the best solution for your project together.

To become part of our partner program, simply fill out the form at https://dvs-beregnung.de/en/dvs-partners. We will then contact you by telephone to present the partner program to you in detail and discuss all the processes with you.

To become a DVS partner, you must be logged in and registered as a gardening and landscaping company or irrigation installer. Our partner program is based on trustful cooperation and therefore relies on reliability and excellent customer service. This means that you should respond quickly and professionally to customer inquiries that we refer to you. In addition, you agree to purchase all products required for these projects from DVS Irrigation.

The DVS Partner Program offers you a variety of benefits to help you grow your business.

• Project referral: Enjoy a prominent link on our DVS website and receive customer inquiries from your region directly from us.
• Exclusive telephone hotline: Reach our support team quickly and easily via a phone number set up specifically for partners.
• Priority e-mail processing: Your e-mails are specially marked by us and are processed by our service team in the shortest possible time.
• Quotation preparation & planning service: On request, we can take over the entire customer planning process for you so that you can prepare a quotation for the customer directly. With our online planning software, the DVS irrigation planner, you can also carry out planning yourself and create quotations quickly and easily.
• Exclusive partner promotions: Benefit from training courses, special promotions and offers reserved exclusively for our partners.

• Step 1: Customers looking for an installer can submit an inquiry via our contact form at dvs-beregnung.de/bewaesserungsinstallateur-finden.

• Step 2: As soon as we receive an inquiry, we talk to the customer about the date and project. We then check which partner is the best fit in terms of location and expertise.

• Step 3: We contact the selected partner by telephone and provide the most important project details.

• Step 4: If the project is of interest to the partner and is feasible in terms of time, the partner confirms the takeover and we officially pass on the project.

• Step 5: Once the project has been completed, we obtain brief feedback from the customer and partner in order to further optimize the collaboration.

There is no obligation to accept a project. If, for example, there is no capacity, the project request can be rejected without any disadvantages.