Question about Hayward SAND FILTER, PRO SERIES

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Ive got an older hayward vari flow that leaks out of the flange that bolts the valve to the tank, Ive been trying to get a new oring but all the pool people been getting me the wrong one, there all too small, they say they can all get me the correct one if I get them the serial no. this is a problem because there wore off, all the valves Ive been looking at are the screw in type, mine is the bolt on type, the oring is approximately 3/8s of a inch thick, can you help me?

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  • 34 Answers

Most hayward sand filters use a GMX600F or GMX600F-H o-ring.
If it is an older tank it might use the GMX400F which is smaller, and rare to come across. Most 400 Valves are not marked vari-flo.

Hope it helps.

Posted on Jul 23, 2009

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1 Answer

Can a Hayward s 166 t Hi rate sand filter be rebuilt


Parts can be replaced sure, but will it be worth it compared to buying a replacement or even upgrading. Laterals (if broken sand gets in pool) can be replaced on this unit from 48 off amazon and is cheaper than buying a new unit, same with leaking rings or seals. but if a part of the tank is cracked or something like that you might up spending almost as much to replace a piece of the unit as it would be buy a whole new unit. Amazon has this model for 180$ if repairs would cost more than 80 I would say replace it, these things dont last forever, especially if you live in a cold place that freezes in the winter and it sits in the sun all summer.
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There was also a couple smaller parts on amazon but you should check it out and also compare them to some other places.

Aug 09, 2015 | Hayward Pool & Spa

1 Answer

Hayward Vari-flo Xl


You have a bad o-ring at the flange... or the clamp is loose?

May 04, 2013 | Hayward SAND FILTER, PRO SERIES

1 Answer

Noisy Hayward Vari-Flo Valve Model 710xr50


I HAVE TO ADD MY TWO CENTS! THANK YOU TO THIS WEBPAGE- I had air and gurgling coming from my Hayward Variflo - I sealed all the leaks, and had crystal clear sight glass on my pump, but it still gurgled- I never in a million years suspected too much OUT flow- and it is the easiest thing to test- just cover one of the outputs to restrict the flow back to the pool, and listen- my noise died right down.
THANKS GROUP

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1 Answer

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use Teflon tape or add a oring

May 28, 2012 | Hayward Pool & Spa

2 Answers

Problems with hayward vari flow valve.


It sounds like you might just need to replace your valve. They are fairly inexpensive. Try contacting this company. They will be able to tell you exactly what you need to do (free advice) and will have the parts necessary if you do need to buy a new pool filter or new parts.

Backyard City Pools 888-751-0101 or www.backyardcity.com

Just let them know that you need to speak with the person in charge of pools. He will be able to help.

May 22, 2010 | Hayward SAND FILTER, PRO SERIES

1 Answer

How to open pool, fill sand filter with water?


I happen to have a copy of the users manual for this pool filter. These are the instructions for operating your filter.

1. Be sure correct amount of filter sand media is in tank and
that all connections have been made and are secure.
2. Depress Vari-Flo control valve handle and rotate to
BACKWASH* position. (To prevent damage to control valve
seal, always depress handle before turning.)
3. Prime and start pump according to pump instructions (be
sure all suction and return lines are open), allowing the filter
tank to fill with water.
WARNING: ALL SUCTION AND
DISCHARGE VALVES MUST BE OPEN WHEN
STARTING THE SYSTEM. FAILURE TO DO
SO COULD CAUSE SEVERE PERSONAL
INJURY.
Once water flow is steady out the waste line, run the pump for
at least 2 minutes. The initial back-washing of the filter is
recommended to remove any impurities or fine sand particles
in the sand media.
4. Turn pump off and set valve to RINSE position. Start pump
and operate until water in sight glass is clear—about 1/2 to 1
minute. Turn pump off, set valve to FILTER position and
restart pump. Your filter is now operating in the normal filter
mode, filtering particles from the pool water.
5. Adjust pool suction and return valves to achieve desired
flow. Check system and filter for water leaks and tighten
connections, bolts, nuts, as required.
6. Note the initial pressure gauge reading when the filter is
clean. (It will vary from pool to pool depending upon the
pump and general piping system). As the filter removes dirt
and impurities from the pool water, the accumulation in the
filter will cause the pressure to rise and flow to diminish.
When the pressure gauge reading is 8-10 PSI (0.55-0.69
BAR) higher than the initial "clean" pressure you noted, it is
time to backwash (clean) the filter (see BACKWASH under
Filter Control Valve Functions.)

Apr 16, 2010 | Hayward SAND FILTER, PRO SERIES

1 Answer

Sand in my waste water


O-rings or gasket are replaced to stop leaks, so that wouldn't have helped you.

It could be one of two things; either the white PCV-like pipe in the filter tank is cracked OR some of the laterals at the very bottom of the tank, under the sand, has melted. A whole new underdrain assembly is usually $70.

Aug 31, 2009 | Hayward Pro Series 31 Inch In Ground Pool...

1 Answer

Problem with vari-flo multipoer 1.5 and Hayward DE fiilter


You need a rebuild kit for the valve and possible a sand change. Sand should be changed ever 3 - 5 years or so depending on overall pool conditions.

The gasket inside the valve is out of place and therefore allowing water to leak out the waste port. Use a gokit to replace all the gasket/orings and you should stop the leak.

If the flow is still bad, inspect the sand and change it if necessary.

Jun 26, 2009 | Hayward SAND FILTER, PRO SERIES

1 Answer

Vari flow is on filter but dirt is passing into pool.


You can replace the spring inside if it is too loose, however you are unlikely to see damage on laterals. It only take a couple thousanths of an inch wear for them to allow sand and/or dirt past.

Jun 12, 2009 | Hayward SAND FILTER, PRO SERIES

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