PC Dripper with Non Drain Check Valve

Videos

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  Demonstration Connecting a Button Dripper to .700 Poly Tubing

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  Demonstration Connecting a PC Drip Emitter to 1/4" Micro Tubing

About PC-CV Pressure Compensating Drip Emitters with Built-in Check Valves

The Pressure Compensating drip emitter contain a silicon diaphragm that continuously adjusts to varying water pressures and at the same time allows particles to pass through the drip emitter’s water passage, providing reliable performance and a longer life. This method of flushing with a large flow path allows the drip emitters to operate at optimal flow rates under extreme conditions. In addition, the emitters have a special water-saving feature that eliminates water draining when the system is shut off at around 2.2 PSI. At this pressure, the PC drip emitters shut off completely, preventing any water drainage from the lateral. When the system is turned on again, the drip emitters simultaneously reopen at 4.4 to 4.5 PSI for precise control of water flow over the length of the lateral.

The two models of PC drip emitters with preset flow rates discharge the same amount of water under a pressure range of 10 to 50 PSI, allowing for higher uniformity and longer lateral runs on any topography. This feature allows the number of drip emitters on a single drip tubing to be maximized while maintaining an even flow rate from each emitter along the line.

When using single drip emitters, it is important to select the correct flow rate in order to achieve a wetted pattern shape that can cover at least 70% of the plant root zone. In sandy soil, water tends to drain quickly (gravitational force) with little lateral movement, so applying a higher flow rate over a given time period will produce a wider pattern. Using .5 GPH drip emitters for one hour will provide a smaller wetted area then using 1 GPH for the same time, due to the soil characteristics.

One of the most common installation errors in installing drip irrigation is using too few emitters. All too often, only a single emitter with a preset flow is placed at the base of a newly planted tree, shrub or rose. In clay soils, a single drip emitter can wet a three to four foot diameter; on sandy soils, the same layout using the same drip emitter will only wet an area of a few inches. Because plant roots can grow up to a few feet a year depending on the plant and location, after one year the diameter of the root system would be much larger than the area covered by the one drip emitter. A single drip emitter per tree or shrub could restrict root development as early as the first year after planting if flow is not adjusted or more drip emitters are not added. We recommend adding more than one drip emitter per plant, depending on plant size.

Installation suggestions

Basic installation recommendations for this product include first reviewing the area and then making a drawing of the garden or site with your preferred layout.
If automation is required, use one of DIG hose end timers or battery operated controllers. The ideal controller should have flexible scheduling and two to four start times per day for added flexibility.

Start the installation from a PVC pipe or to pipe thread

Recommendations: Wrap all male pipe thread fittings with Teflon tape. Do not use pipe cement on the valve as it will damage the valve and void the warranty.

1. If the system installation is started from a PVC pipe, first shut off the main water supply.
2. If an automated system is preferred, we recommend installing a 3/4″ ball or gate valve before the battery operated controller or AC valve, if used. This ball valve can be very useful as an emergency backup to turn the system off. This type of arrangement is used by professional installers.
3. Turn the water supply on to flush the line and then shut the water supply off using the new ball or gate valve.
4. Install an AC valve or battery operated controller, wrapping TEFLON tape on the male pipe thread fittings.
5. Turn the water supply on again to pressurize the system. The unit will open momentarily and then will shut off.
6. Test the valve or the battery operated controller and make sure that it is working correctly.
7. After the AC valve or battery operated controller, add a 3/4″ screen filter with 155-mesh (model D55). The screen filter is used to protect the drip system. Next, add a preset 25 PSI pressure regulator (model D46P) or adjustable pressure regulator (model PRV075). The pressure regulator is used to lower the pressure to the suggested operating pressure for a drip system. Follow with a 3/4″ swivel adapter (model 50001) to the drip tubing or 3/4″ PVC thread x slip adapter to the PVC line.

Start the installation from a faucet or hose thread

Start the installation from a faucet or hose thread

1. If an automated system is preferred, install a hose end timer.
2. Test the timer and make sure that it is working correctly.
3. After the timer, add a backflow device (model D45). Next, add a 3/4″ filter (model D57A) to protect the drip system and then install a 25 PSI pressure regulator (model D46) to lower the pressure to the drip system. Finally, attach a swivel adapter (model C34) to connect the drip tubing.

Product installation

1. Using the drip tubing as the main lateral or as a sub lateral, lay out the drip tubing per your layout drawing. Secure the drip tubing to the ground using stakes (model R60) in key areas and add more stakes as you unroll the drip tubing. Add stakes every 20′-30′ and at the end of each section or as needed. An extra 1% of drip tubing length should be added to each lateral to compensate for contraction at low temperature.
2. Throughout the installation and per your drawing layout, add, if needed, 1/2″ fittings such as tees (model C35) and elbows (model C36), leaving the end of the drip tubing open. To install the 1/2″ compression drip fittings, cut the drip tubing with a hand pruner, being careful to keep dirt from entering the line. Hold the fitting in one hand and the drip tubing in the other and force the drip tubing into the compression fitting by wiggling it from side to side.
3. The drip emitters are installed along the drip tubing at varying or at specific intervals. The distribution uniformity of water from the drip emitters along the line depends on the incoming pressure, number of drip emitters used per lateral and the length of the laterals. Special care should be taken to ensure high uniformity of water along the laterals by not exceeding the product recommendations (see Product Specifications).
4. Install the drip emitters using one of three methods:
   A. Insert the drip emitter directly into the poly tubing near the plant.
   B. Extend the drip emitters from the poly tubing to the plant and insert them at the end of the micro tubing.
   C. Insert the drip emitters directly into the poly tubing, extend the micro tubing to the plant and secure with a stake.
5. To install the drip emitters, you may use one of the options suggested: Option A: Punch a hole into the drip tubing using the small punch (model D44) or the gun punch (model 16-035), and snap the barbed side of the drip emitter into the drip tubing. Option B: Install the drip emitter into the micro tubing by cutting a length of two to four feet (we highly recommend not exceeding four feet) of 1/4″ micro tubing (vinyl – models B38 for 50′ and B38100 for 100′ / poly – models B38P for 50′ and B38100B for 100′). To the micro tubing end, insert a 1/4″ barb (model H80A for pack of 10 and model H80B for pack of 50). To the other end of the micro tubing, insert the barbed side of the drip emitter, add a stabilizer stake (model P35B for pack of 10) and secure to the ground. Punch a hole into the drip tubing using the small punch (model D44) or the gun punch (model 16-035), and insert the 1/4″ barb at the end of the micro tubing into the drip tubing. Option C: Punch a hole into the drip tubing using the small punch (model D44) or the gun punch (model 16-035), and snap the large barbed side of the drip emitter into the drip tubing. Cut a length of two to four feet (we highly recommend not exceeding four feet) of 1/8” or 1/4” micro tubing (model B34 for 50′ of 1/8″ micro tubing). Insert the micro tubing into the barbed outlet of the drip emitter and extend to the plant. At the end of the micro tubing, add a stabilizer stake (model P35B for pack of 10) and secure to the ground.
6. Turn the water on and flush the line.
7. Close the end of the drip tubing using the hose end (model Q58) or figure “8” (model F68B).
8. Pressure-test the system to identify leaks in the drip tubing laterals, fittings and micro tubing, and then program the hose end timer or battery operated controller.