Nylon and PVC Valves

Nylon and PVC Valve s offer structural simplicity and superior hydraulic performance for surface or subsurface agricultural applications. The valves operate by pipeline or external pressure and the reinforced rubber diaphragm seals the water passage when the line pressure reaches the valve’s control chamber. They are simple to install with slip or threaded connections and available in 1″ to 6″ sizes.

Product Advantages

  • Superb hydraulic performance.
  • Simple design with only one moving component, the diaphragm, means parts are not located in the water passage way.
  • Low operating pressure.
  • Simple inline installation with minimal maintenance requirements for maximum dependability.
  • Durable, corrosion-resistant materials provide high resistance to corrosive water containing fertilizers and chemicals.
  • Nylon valves have threaded connections.
  • PVC valves have threaded or socket (slip) connections allowing pipes to be cemented into the valves.


  • Ideal for water control in PVC networks
  • Agriculture or Greenhouse and Nursery applications
  • Surface or subsurface installations
  • Portable systems

Nylon and PVC Valves Technical


  • Recommended Operating Pressure (psi): Nylon – 15 minimum to 145 maximum PVC – 7 minimum to 145 maximum (based on valve size)
  • Maximum Water Temperature: 140° F
  • Optional Functions: Manual, Electric, Pressure Reducing, Pressure Sustaining or Remote Control and more functions


  • Nylon Valve Body, Bonnet, Seat:Glass Reinforced Polyamide (GRP)
  • PVC Valve Body: uPVC
  • Spring: Stainless Steel (AISI 302)
  • Nuts, Bolts, Washers: Zinc Coated Steel (BS 5216)
  • Diaphragm: Natural Rubber
  • Connections: Threaded – ANSI (NPT Female) Socket – IPS, PVC Standard

Manual Valve Operation with
a 3-way Selector

  • CLOSED (C): Upstream pressure or pressure from an external source is applied to the control chamber. Initiated by the spring, the diaphragm is pressed down to close the valve drip-tight.
  • OPEN (O): Relieving the water or air pressure to the atmosphere from the control chamber causes the valve to open.
  • AUTOMATIC (A): The automatic port of the 3-Way selector is connected to a solenoid, hydraulic relay or pilot which controls the valve. The common port of the 3-Way selector connects the control chamber to either A, O or C, depending on the direction the selector is pointed.


  • THREADED VALVES: Use a few layers of Teflon tape or Teflon sealer compound on the adapter and tighten by hand. Use a wrench to tighten the adapter another half revolution.
  • SOCKET OR ‘SLIP’ VALVE WITH PVC PIPE: Use the same procedure as when cementing PVC pipes. Mark the pipe first, then apply glue to the socket of the valve and the PVC pipe. Insert the pipe until reaching the mark and rotate a quarter turn. Hold the joint in place until the cement hardens.
  • SURFACE INSTALLATION: When installing the manifold above ground, the length of the manifold should be kept as short as possible (this eliminates the need for additional support). For longer lengths, a firm support under the horizontal pipes is recommended. Always install the valve with the bonnet exposed to the sun.