25831-004-000 Slide Valve. Use with Hayward Micro-Clear™ High Rate DE Filters. DE SLIDE VALVE MANUAL CMP 25831-004-000. 90% of filter cleaning is simple manual labor. The other 10% requires some patience and manual dexterity, but it can be done. This should be obvious, but always conect a pool drainer hose (those blue plastic hoses) to the waste (to street) pipe off the multiport valve, and roll that hose out to the street or a driveway slanted.

Rob Cox by February 21, 2014 Replacing a Pool Filter Backwash Valve It happens all the time, where I'm talking to someone about a filter problem they're having - when it's actually a valve problem. DE and Sand filters use either a Multiport valve (MPV) or a Push-Pull (slide) valve to backwash, or send the water backwards through the filter media, flushing out the dirt.

These types of multi-directional valves are very convenient, but they do require maintenance. Slide valves are much less complicated, and hence more reliable than MP valves, which have many more parts, especially in the key assembly, which is the part that lifts out when you remove all of the bolts around the lid. When Should the Valve be Replaced? The question is valid, because you could, in most cases, replace a few and restore your valve to like new condition. It may need a very small part or gasket, or a whole new key assembly (shown above), which is a plumbing free repair and usually easier than a valve replacement.

Nonetheless, there are times when it makes sense to replace the. • Cracked Valve body • Cracked Union nuts • Whole is cheaper than the Parts Replacing a Push Pull Valve A Slide valve attaches to a sand or DE filter through two bulkheads, but they aren't the same valve. A DE slide valve will enter the tank through the bottom bulkhead and backwash out of the top - for a sand filter slide valve, it's just the opposite. So, they're not interchange able, and neither are valves of different manufacturers. The bulkhead spacing and the thread size are different on valves from different manufacturers, so make sure that you have selected your new valve by type, manufacturer and port size.

Hexweb Typograph Download. The Hayward plumbing design is shown left, with the plunger handle in the up or backwash position. Other manufacturers have the waste port coming out of the bottom of the valve body, but again if you replace with the same valve, you should have no problems. To replace a push pull valve, on a sand or DE filter, first drain the filter tank. Find a suitable place to cut the two pipes that glue into the valve, on a spot of PVC that gives you 2' on either side of your cut, to reattach the pipes with a glued coupling.