![]() Take the butterfly valve and use PVC primer to clean the ends of the fitting. Step 2 - Clean and Prepare Connec tion Fittings If you have dedicated isolation installed for your sprinkler system, shut off the water by closing that valve. Just build to fit.If the irrigation system for your lawn will be connected to the main water supply pipe, turn off the main water valve that is located at the water meter. If you need it multi-level, in a square, a cross or whatever, the parts are available. While most manifolds tend to be of a similar design there are no set restrictions other than system performance. The connections at the valve depend entirely on the type of valve you purchased. It will provide the strength needed to handle not only the water pressure but the stress the assembly goes through while being assembled and placed. Or, if you only need three valves, go ahead and build for four and cap the fourth one. You run the pipe past the last valve and cap it off to allow for future expansion. This tells you that you need 4 Tee’s, 4 couplers, 1 end cap and your main pipe. Doing so will automatically build the part list. Sketch out your design, paying attention to fittings. All we need now is rough design and a list of parts. Now we know that 4 valves will fit easily into the standard valve box mentioned above. Even if you use the small valves with Phillips head screws allow some working space between them. Working on the edge of a valve box is difficult enough. Now we allow 1” between each of them AND 1” on the outside of the two outside valves. So touching edge to edge would give us 12 1/2”. If you have a jar-top type you need to allow room for fingers to get on each side of the top to grip and remove.Īssume we are using jar top valves and need 4 of them. Some, however, are known as “jar top” valves and have a screw-on top, as its name implies. This lets you repair them without removing and replacing the entire valve, which can involve good deal of digging, cutting, gluing, and usually a little cussing. All valves are designed to have the tops removed. What does this mean to you? We need to know beforehand what valve you will use. If you add another brand the smallest size drops to 2 7/8”. Looking at just one major brand, the width on 1” valves ranges from 3 1/8” to 4”. The “how big is our valve” question relates to more than “it fits a 1” pipe.” It also relates to the physical size of the valve.
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