![]() Use a valve with some kind of swivel connection (or a union) Use a valve with FPT connections and use a MPT x slip connector to connect to the laterals and supply linesģ. Use a valve with slip connections and glue the lateral and supply lines directly to the valve.Ģ. Just build to fit.If one uses glue and fittings, there seem to be three approaches about how the valve attaches:ġ. 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. Do we want to design for future expansion?.Questions you should know before we start: #Sprinkler manifold freeIf you are not installing in a valve box then we are free to design as we wish. If we are using one of these we need to design to fit. One consideration before we do anything is: where will it be installed? If it is underground in a valve box, how big a valve box do we have? For example, the standard size is roughly 13” x 20”. The second, though not common, is a situation where you will have non-standard shapes.ĭesigning and building your own manifold is fairly simple. The primary one is that the dimensions and connections they offer may not fit what you need. There are disadvantages to the pre-made manifolds. They are available with valves complete or as do it yourself assemblies. This shows one with the valves already installed. They are pressure rated so you know what they will handle 3. They are made of schedule 80 PVC, heavier than you can normally purchase 2. You can buy a pre-made manifold if you wish. It can cut also down drastically on the cost of wiring. This gives them easy access for maintenance, prevents them from being lost due to construction or being overgrown. A Manifold is simply an assembly that lets you attach all your valves in a one area on a common pipe. #Sprinkler manifold installTo ease both installation and maintenance many people install their valves in valve manifolds. How to Build an Irrigation Valve Manifold Using PVC pipe Fittings ![]()
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