Microjet Poly Standpipes Have A 12 Bar Pressure Rating But Have Been Extensively Tested In Excess Of 30 Bar Without Any Leaks Or Breakages. They Are Designed For Use In Cold Water Applications And Irrigation In Particular. Being Made From Polypropylene With Carbon Black Gives Them Excellent Chemical And Uv Resistance. These Standpipes Are Available In Three Sizes 15mm (1/2inch; 20mm (3/4inch) And 25mm (1inch). Lengths Vary From 50mm To 1500mm Or Longer On Request. The 15mm (1/2inch) Range Is Best Suited To Use With Shrub Adaptors And Spray Nozzles While The 20mm Range Is Suited For More Sturdy Applications Such As Impact Sprinklers; Pop Ups; Gear Drives As Well As Swing Joints On Sports Fields Or Heavy Foot Traffic Lawn Areas. The 5mm Range Can Also Be Used With Manifold And Solenoid Valve Assemblies. The High Quality Bsp Standard Thread Ensures An Easy And Leak Proof Connection Every Time.