Question about Intex Krystal Clear Model 635 Pool Filter Pump 1500 Gph

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How to convert from 637R pump to 635T pump? The inlet & outlet opening of the pool are too small

Posted by Melanie on


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Katrina Flores

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Hi I have a 637r pump that had no hoses when the pool was given to me so I was just gonna buy a 635t pump that has everything included for 50$ bucks can I use that pump in replace of a 637r pump?

Posted on May 23, 2020


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SOURCE: I have an intex 15 x 48 pool. The old pump wasnt

check the intex site for adapters and other parts you might need.
I don't think you should buy new pool .

Posted on Jul 15, 2009


Nicole Clevinger

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SOURCE: New Intex FP621 4000 Pool Pump Noisy

I have a 16 x 48 intex pool with the 1inch inlet and outlet. I purchased the intex 4000 pump. The attachments are too big for the inlet and outlet so i then purchased the adapters. The plungers are very noisy and allow air to get into the pump. I removed them and hooked the hoses up to the adapters directly. That worked as long as the adapters were new. This year the seal comes loose and allows air to get into the pump. I even tried allowing the top nut to be loose to allow air to escape. This year nothing works. The pump is just too strong for the holes. I was considering cutting the holes bigger and glueing seals on there but i was concerned about creating weak spots in the pool. I am tired of spending money on it so i did the redneck thing. I can say that because well, you might consider me one. I took the inlet hose off the connector and plugged the hole with one of those little black things. I took the hose and run it up through the hole in between the liner and the poles and down into the pool. If you run it over the top it will not work correctly. Take the hose and tie them together between the two sides as best you can to keep the hose in the pool. If you look at the smaller intex pools that dont have holes, that is how they have the pump hooked to the pool. VOILA! You have an airtight inlet to the pump. You do not need to do that to the outlet because its not sucking water its just pushing it. So, just hook the hose up as you wish. When you need to clean the filter, I put wash clothes in the hoses to plug them and voila. No air gets into the filter. Done! It is actually keeping my pool clean this year. Also, i purchased one of those aqua vacuums and it does work great for this pool. Once you get the big stuff, sweep it with a pool broom and the filter will do its job. You can vacuum these pools with the filter type pumps. Next time, i will purchase a sand filter and be done with it. Happy swimming with less work.

Posted on May 22, 2010


  • 27 Answers

SOURCE: what chemicals do I use

You will need a test kit to maintain the levels correctly. But I just filled a 16ft round (5000 gals) and use 6ea 1 inch hth tablets every 2 days

Posted on Jun 25, 2010


  • 4376 Answers

SOURCE: hi, we have a intex

be sure the pump is turned off before you try.

Posted on Sep 27, 2010

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what are you asking?
do you want to know how to plumb the individual pieces of equipment?
If so, skimmer port at the pool will go into the suction port of the pump, the port directly into the hair & lint pot.
discharge off the top of the pump will go into the Inlet of the filter valve, then the outlet of the filter will go to either a heater inlet port then outlet of the heater to the pool return inlet ports. If no heater, then from filter outlet directly to the pool return inlet fitting.

Good luck


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