Spray Stake Assembly Selection & Sizing

STEP 1
Spray Stake selection is based on the container size. To determine the size of the Spray Stake Supply Pipe refer to one of the charts below.

If using a PCNL Spray Stake Assembly, use the PCNL GREY OR PLUM SPRAY STAKE ASSEMBLY MAXIMUM ROW LENGTH to select the spacing between the spray stakes, the spray stake to be used, and based on the row length, the correct size Spray Stake Supply Pipe can be determined.

If using a non-pressure compensating spray stake assembly, use the SPRAY STAKE ASSEMBLY MAXIMUM ROW LENGTH chart to select the spacing between the spray stakes, the spray stake to be used, and based on row length, the correct size Spray Stake Supply pipe can be determined.

STEP 2
Use the PCNL SPRAY STAKES ZONE FLOW CHART or the SPRAY STAKES ZONE FLOW CHART below to determine the Flow Demand for the system. Select from the chart the number of spray stakes to be used at the same time. Use the resulting flow to determine the correct sizing for the pipe and control head components.

STEP 3
Size the Distributor and Mainline Pipes using the Maximum Flow Demand from the largest zone or combination of zones which may be watered at the same time. Either PVC, or polyethylene pipe can be used for the Distributor and Mainline. If PVC is used above ground, it should be painted to prevent light penetration, which can result in the growth of algae within the pipe. NOTE: These charts are appropriate for distributor lengths of up to 40 ft. and mainlines of up to 100 ft. When slopes are a factor, when longer length pipes are needed, or for other special conditions, please contact Netafim USA Customer Service for further assistance.

STEP 4
Size the Head Control (filter, pressure regulator, and valve) based on the Flow Demand determined in Step 2. It is very important to recognize the minimum flow for the pressure regulator. Be sure to size the pressure regulator by determining both the minimum, and the maximum number of plants which may be watered at the same time. The size of the Head Control components should be determined by the flow demand, and not the size of the pipe that connects to them. Mixed sized pipes and components (e.g. 1" filter on 1 1/2" pipe) will have no negative effect on the operation of the system if properly sized by the flow control. The 35 psi Pressure Regulator should be used on all Pressure Compensating assemblies and a 20 psi Pressure Regulator can be used for non-pressure compensating assemblies. Refer to Greenhouse and Nursery Price Catalog for part numbers.

For any additional questions regarding Selection and Sizing for Netafim Spray Stake Assemblies, please contact Netafim USA Customer Service at 888-638-2346.