A450 Four-Outlet Drip Manifold Kit


This model has been discontinued.

A450 Four-Outlet Drip Manifold Kit

A450 Four-Outlet Drip Manifold Kit

DIG’s Four-Outlet Drip Manifold Kit is a complete kit utilizing a four-outlet high flow emission device to retrofit an existing 1/2″ sprinkler riser into a four-outlet drip irrigation system without altering or increasing the flow of the sprinkler system zone. The four-outlet drip manifold with 1/2″ female pipe thread is a pressure compensating head operating at a pressure range of 10-50 PSI with an even flow rate of 6 GPH per each outlet. The kit allows installation flexibility when incorporated into a new system or as a part of a sprinkler system zone. The manifold has four barbed outlets and 50′ of 1/4″ micro tubing to deliver the water under the plant canopy and includes stakes to hold the micro tubing in place. It can also incorporate 1/4″ drip line or drip emitters with a maximum flow of 6 GPH to achieve good root zone coverage of individual plants or groups of plants.


  • Replacing the sprinkler riser with the four-outlet manifold can lead to water savings of 50% to 70%
  • Built with backup screen filter
  • Color coded
  • Can be used to water roses, shrubs, groundcover and trees
  • Complete kit; all parts included
  • Applies water directly to the plant root zone area, leading to less surface evaporation from leaves and soil
  • Eliminates wet walls and discoloration and staining of fences and windows
  • Designed for new and existing landscapes, including oddly shaped areas where a sprinkler head cannot provide good coverage
  • No special tools or glue are needed
  • DIG’s drip irrigation products may be exempt from residential and commercial watering restrictions (check local codes)
  • Barbed elbow outlets allow installation flexibility
  • Pressure compensating feature allows for equal flow rates from each outlet
  • Install above grade, or place below grade in a 6″ emitter box
  • Use with any 1/4″ micro tubing


How to Order
A450 4 Outlet Drip Manifold Kit


  • Operating pressure: 10 to 50 PSI
  • Flow rate: 6 GPH per outlet
  • Color code: black
  • Inlet size: 1/2" with female pipe thread
  • Barbed outlet used with 1/4" micro tubing (.140 to .170 ID)
  • Materials:
  • Body and cover: high-impact plastic
  • Diaphragm: EPDM

Box Contents

qty description
1 four-outlet drip head with 6 GPH per outlet
1 50' of 1/4" micro tubing
4 barbed elbows converter
4 stabilizer stakes


The A450 Four-Outlet Drip Manifold Kit can be used on new or existing installations to convert a sprinkler riser into a drip irrigation system, applying 50% to 70% less water than a conventional sprinkler system. It applies water at the root zone area of the plant only, eliminating pest problems, weed growth and water waste from evaporation and run off. The four-outlet manifold can be used to cover individual plants or closely spaced groups of plants within the layout. This kit is a complete kit containing all the parts required to install a complete system.

The four-outlet manifold can apply water to most landscape gardens utilizing the same short range watering cycles as used with spray heads to meet most watering applications. Using drip irrigation, water first thing in the morning before the temperatures begin to rise. This will allow excess moisture on leaves and top soil to dry before fungal and other diseases can develop. The most common cause of early plant death is over watering. Using drip irrigation can help sustain healthy plants by applying water directly to the plant root zone when and where it is needed. For established plantings, deep, infrequent watering is recommended. In most cases, applying deep watering will encourage deeper rooting, which leads to stronger, healthier plants.

Installation Steps

A450-step-1Remove existing sprinkler from riser.

A450-step-2Screw on the four-outlet drip manifold.

A450-step-3Insert each of the press-fit barbed elbows into the four outlets and connect the micro tubing to the barbs.

A450-step-4Run lengths of micro tubing to your plants and secure with the tubing stakes.

Example layout:


Installation suggestions

A drip irrigation manifold is designed to convert a 1/2″ sprinkler riser into a drip irrigation system. The drip irrigation manifold may be incorporated into a new system, or used to convert an existing sprinkler riser to a multi-outlet drip irrigation system. Retrofitting a conventional sprinkler riser to a water-saving drip irrigation system requires a few simple steps including evaluation of the areas to be watered and selection of the best method to water. The most suitable uses for a multi-outlet drip irrigation manifold are shrubs, trees, roses, pots or individual plants that can be irrigated more efficiently using a drip irrigation system.

  1. First, we recommend using the four-outlet manifold in an area where the plants are close to the sprinkler riser you are replacing. We recommend using shorter lengths of micro tubing, not exceeding six to eight feet from the riser, to allow for easy maintenance.
  2. Make sure that the output of the manifold is sufficient to cover the plants in the area close to the sprinkler riser.
  3. Remove the sprinkler from the riser.
  4. Turn the water on to flush the line. Then, shut off the water and thread the multi-outlet manifold onto the riser.
  5. From the manifold outlets, extend 1/4″ micro tubing to the plant areas. At this point you have a number of options:
    • Secure the end of the micro tubing with the stake included in the kit. This option will allow for a flow of 6 GPH from each outlet used.
    • To the end of the micro tubing, insert a 1/4″ barb (model H80 not included in the kit) and connect 1/4″ drip line (model SH50 not included in the kit) or soaker hose (model PSH50 not included in the kit) and loop it around the plant. This option will provide a larger wetted area under the plant canopy and provide even water distribution from each of the four outlets. This option allows for five to six feet of drip line or soaker hose per each outlet.
    • To the end of the micro tubing, insert a 1/4″ tee (model H82 not included in the kit). From the tee, extend additional lengths of micro tubing and insert a PC drip emitter or adjustable drip emitter (models B224B or B10B not included in the kit) with the drip emitters placed under the plant canopy, at the center between the plant trunk and the plant canopy edge.
  6. Connect the micro tubing onto the converter barbs included in the kit, and insert each barb into one of the open outlets.
  7. Turn the water on and check the system, making sure that all outlets are working and the location of each outlet meets your needs.

Note: One of the most common installation errors is using too few, and poorly spaced, drip emitters. Often only a single emitter is placed at the base of a newly planted tree or shrub. In clay soils, a single drip emitter can wet three to four feet in diameter; on sandy soils, however, the same layout using the same drip emitter will only wet an area less than one foot in diameter. Because plant roots can grow a few feet a year depending on the plant and location, after one year the diameter of the root system might exceed the diameter of the watered area. A single emitter per tree or shrub could therefore restrict root development as early as the first year after planting. For this reason, it is especially important to place additional drip emitters around each plant, early in the plant’s life.

Note: To expand the system we highly recommend continuing with the same model kit or products. Review the instruction manual included with the kit for complete details.