Question about Jandy LAARS VALVE, PRESSURE RELIEF 75PSI 3/4" NPT

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Spa draining into pool

When pump and filter are off, spa drains into pool: spa water drains down to intake valves at bottom of spa, pool water level rises. Have been told this problem may be due to a faulty check valve; how to locate check valve so I can take it out and bring it in to the pool store to buy a new valve? I don't know what product to choose on the product list.

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Check should be on spa return line from filter or heater. its 1 1/2 or 2 inch pvc

Posted on Aug 11, 2009

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Posted on Jan 02, 2017

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2 Answers

I overfilled my pool and need to drain the excess


if you have a sand filter. you can economize and perform a long backwash cycle. this will clean the sand and lower the water level. otherwise, just use the drain/waste option. if you have a cartridge filter, your manufacturer should have installed a three way drain valve between the pump and filter. by turning this valve, the water will be diverted from the filter to waste

Sep 29, 2014 | Pool & Spa

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How to remove a underground swimming pool pump


if the pump is above water level there is no need for valves. If the pump is below water level, partially drain pool until water level is below pump, then install unions and shut off valves when you remove the pump.

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What setting do you put it on to drain the pool for plaster repair


There is usually a setting on the handle that says "Drain" but if not you can always use the Backwash setting to get all the water out of the pool or at least most of it.

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May 12, 2014 | Hayward SAND FILTER, PRO SERIES

1 Answer

Spa Drains Down to Pool Level


install check vales - this will stop the water from leveling off between the pool and the spa

May 22, 2012 | Pool & Spa

1 Answer

Sticker wore off on the filter. which button backwashes? the pool is about to overflow.


b> VALVE SETTING FUNCTIONS OF VALVE POSITIONS FLOW DIRECTION THROUGH VALVE FILTER PUMP - TOP - THROUGH FILTER - BOTTOM - RETURN For normal filtration and vacuuming pool through filter. BACKWASH b> PUMP - BOTTOM - THROUGH FILTER - TOP - WASTE For reversing flow for cleaning filter. RINSE b> PUMP - TOP - THROUGH FILTER - BOTTOM - WASTE For initial start-up cleaning, plus resetting filter bed after backwashing. WASTE b> PUMP - WASTE For vacuuming directly to waste, lowering pool level/draining pool. CLOSED b> NO CIRCULATION PAST PUMP PORT For shutting off all flow to filter and pool. RECIRCULATE b> PUMP - RETURN For bypassing filter, but circulating pool water. May be plumbed for "off-system" pool water access. Ideal for Jet-Air® fittings. WINTER b> VALVE NOT IN USE
Ifthis answer does not fix your problem, please comment with additional detailsprior to rating the answer. Positive feedback is appreciated once your problemis solved! Thank you.

Aug 28, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

I have a pool with a built in spa and I need to Isolate the spa from the rest of the pool. So I can heat it and not the whole pool. I don't know how to add pics so I will describe the best I can. I have 2...


the actuator at the intake of the pump divides spa intake and the pool intakesmake sure switch on actuator is on 1 or 2 if in pool mode the off should be at spa intake the out inpool postition the off should be to the spa outlet

Feb 18, 2011 | Jandy Pool & Spa

1 Answer

How do i drain pool with hayward valve? setting is on waste but only drains hottub then looses prime.


you do need to set the filter valve to waste but you need to make sure the valve on the suction side of the pump is pulling water from the pool instead of the spa. Also, if you have a separate skimmer and main drain valve on the pool suction, make sure the skimmer valve is turned off. Otherwise, you will keep losing suction. If you don't have a separate skimmer and main drain valve, you may not be able to drain the pool with your equipment.

Nov 08, 2009 | Hayward SAND FILTER, PRO SERIES

1 Answer

Why does the spa empty when the pump shuts off? just got a pool with an aqualink RS4 and no manual to look at. thanks


This problem can be caused by a couple things. the two most likely culprtits are either the absence of check valves and or incorrect actuator settings when the pump shuts down.

Your spa is most likely higher than the pool. You most likely have a spill over (waterfall) feature from the spa into the pool. This is so the spa water can be recirculated in pool mode. One of your actuator valves may be slightly off closed position in order to allow spill over in the spa, or you may have a dedicated overfill pipe in the circuit to feed water to spa in pool mode.

Whichever spill over piping you have set up, when the pump shuts down, water from the spa ( higher level than the pool) will backfeed through the overflow spa circuit, back through the pump and into the pool through either drain or return. Effectively rendering your spa level the same level as your pool.

To fix this problem, simply install check valves into the spa runs and as a secondary measure put one into the pool return run ( the run that feeds water to pool).

This will insure that when the pump shuts down, no matter which position the valve actuators may be set, water can not back feed through the pump circuit from spa to pool.

Jul 15, 2009 | Water Pik Aqualink Rs4 Package - Pool and...

2 Answers

My pool pump won't prime


If the pump is above the pool water level the it is unlikly that the tank will fill completely with valves open (which is ok).Most pumps are self priming and will pick up a prime with water level below suction inlet on strainer. Try starting on main drain again and slowly open skimmer line. Did you remove water from skimmer line and winterize(if in cold weather climate)during closing?.I know this sounds stupid, but make sure water level in pool is well into skimmer. If air situation remains after scspriggs' and these thoughts then prepare for a pressure test on skimmer line to determine location of leakage.

Apr 21, 2009 | Hayward 3/4hp Super Pump Inground Pool...

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