You can maintain a D. E. filter with an annual or twice yearly breakdown cleaning and inspection. Replace worn or damaged grids and tank gasket, lube the back wash valve, recharge with correct amount of D. E. If you have a back wash valve that sits under the tank then you should consider a pool service tech with knowledge of that specific filter. Because you need a couple of the correct tools to facilitate removal of the tank lid and the rotor valve assemble. This type of filter is known by several names.. . .Purex, C.H.D., Pentair to name a few of which there may be more than one model.
Ken
To effectively clean and maintain your swimming pool using a DE filter, regularly backwash the filter, clean the filter grids, and monitor the pressure gauge to ensure proper filtration. Additionally, regularly test and balance the pool water chemistry to prevent algae growth and maintain clear water.
Simply put, Diatomaceous Earth (DE) are the bones of tiny little animals that lived millions and millions of years ago, diatoms. This DE is used to coat the "grids" inside the DE filter which captures and filters particles as small as 5 microns. When the filter pressure rises, the swimming pool DE filter is backwashed in the same manner as a sand filter. A slurry of DE is put into the skimmer to "recharge" or "re-coat" the grids of these swimming pool DE filters. This type of filter is effective and efficient but a little more expensive to maintain. Some call it the "water polisher" of pool filters.
A DE filter will filter finer particles. It also depends on the application. Some cities are not allowing DE filters to be back washed into their sewer systems within city limits. (Calif) k
For a 17,000-gallon pool, you typically use about 1 pound of diatomaceous earth (DE) powder for every 5,000 gallons of water. Therefore, you would need approximately 3.4 pounds of DE to effectively filter the water in your pool. It’s important to follow the manufacturer's instructions on the DE filter for the best results. Always ensure the DE is evenly distributed to maintain proper filtration.
Because it filters from the outside in. The DE is supposed to coat the outside. Hatawa
Something is allowing the DE to pass through the filter - probably a hole in one of the filter pads or a damaged manifold. You can take out the filter pads and visually check them. A hole will be fairly obvious.
Gayle- There are basicly 3 types of filters. Sand, Cartridge, and D.E. filter. Differences being numerous, but in a nut shell is the ease of maintence and care and the size micron of particle they will filter out of the water. With that said sand is the easist to maintain regularly but, cart., and DE filters filter out smaller particles. DE filter out the smallest particle but, with the most difficult to maintain and repair etc. Hope this all helps, Mystic Waters Inc. GA There's a relatively new filter medium available called zeolite, which is a volcanic sand rather than the usual silica sand. Because each grain of zeolite has one hundred times the surface area of a grain of sand, zeolite used in a sand filter filters almost as effectively as a D.E. filter while being much easier to maintain. I'd absolutely recommend that you look into zeolite before buying a D.E. filter.
How do you back flush a pool filter?
Turn on the pump and put in some DE. Or clean it with filter cleaner and re-assemble then turn ont he pump and add DE.
Check the grid and manifolds for holes or cracks.
Start by cleaning the entire filter. Disassemble and hose off the grids. Without this process you are just guessing as to what is already in the filter. Reassemble. The formula is usually on all DE bags . . . you have to know the square footage of the filter. This is usually stated on the name plate of the filter. Such as 36 sq.ft; 48 sq.ft.; With Hayward it is usually 4800;3600 etc. An easy to remember formula would be take the sq. ft, divide by 5, this answer will tell you how many cans or scoops of DE are dumped into the skimmer. Example: 48 div. by 5 = 10 rounded off. Note: if your filter is more than 1 yr old ~ your filter will have a residual of old DE left in the tank after each Back Wash ~ it never totally removes all the old DE and dirt during a B/W ~ this accumulates so that is why you clean out the filter tank. This formula will give you an even and uniform coating on all grids ~ the DE is what is doing the filtering not the cloth grids. k
The amount of DE (diatomaceous earth) needed for an 18x36 inground pool filter typically ranges from 1 to 2 pounds per square foot of the filter's surface area. To determine the exact amount, check the filter's specifications, as they often indicate the recommended DE amount. Generally, an 18x36 pool may require about 4 to 6 pounds of DE, depending on the filter model. Always consult your filter's manual for precise guidelines.