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Check Valves

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  1. (M) Check valve questions
    by pprior-at-magnus.acs.ohio-state.edu (Paul A Prior) (Tue, 7 Jan 1992)
  2. (M) Check valve questions
    by krogers-at-javelin.sim.es.com (K. Rogers) (Tue, 7 Jan 92)

(M) Check valve questions

by pprior-at-magnus.acs.ohio-state.edu (Paul A Prior)
Date: Tue, 7 Jan 1992
Newsgroup: rec.aquaria

In article <44883-at-hydra.gatech.EDU> gt6441c-at-prism.gatech.EDU ( Jon Edwards ) writes:
>After *many* phone calls to local plumbing suppliers, I finally found
>PVC check valves.  Unfortunately, when I bought one,  
>it said 200 PSI on the side.  What does this mean?  The valve is spring
>loaded, so water flowing through in the correct direction must push against
>the stopper, stretching the spring.  The spring is very tough and requires
>a good deal of pressure to allow water movement through it.
>
>I'm worried that the vavle will create *way* too much back pressure on my
>pump (well, actually it's a Fluval 203 that I will be using as a sump
>pump)
>
>I'm also worried about the metal screws inside and spring inside...
>
>Are there any mail order places that offer these with maybe some sort of 
>ball valve type mechcanism instead of the springs?   

I very strongly recommend Savko Plastics here in Columbus Ohio.  I have
the good fortune to be local to them, but they advertise in FAMA and
other magazines as well.  Andy Kiefner works there and also has a company
building acrylic tanks and TFs/FFs, etc.  He is very helpful and has
everything you'll need for plumbing a tank.

Of course I have no connections with them other than being a satisfied
customer.  If you call  them, mention the net.

Ads are in FAMA, the only bad thing is no 800 number.  It's 614-885-4445
or fax: 614-885-4470.


-- 
--------pprior-at-magnus.acs.ohio-state.edu----(614) 297-8474----------------
Paul A. Prior                                  "With friends like this,   
2nd year medical student		          who needs anemones?"
The Ohio State U. College of Medicine   Tobacco Kills- Please don't smoke!


(M) Check valve questions

by krogers-at-javelin.sim.es.com (K. Rogers)
Date: Tue, 7 Jan 92
Newsgroup: rec.aquaria

gt6441c-at-prism.gatech.EDU ( Jon Edwards ) writes:

>After *many* phone calls to local plumbing suppliers, I finally found
>PVC check valves.  Unfortunately, when I bought one,  
>it said 200 PSI on the side.  What does this mean?  The valve is spring
>loaded, so water flowing through in the correct direction must push against
>the stopper, stretching the spring.  The spring is very tough and requires
>a good deal of pressure to allow water movement through it.

Sounds much to hard.  A Fluval can't push against much head at all.

For what it's worth, here's my $1 on check valves: I've used two
kinds, a true union viton ball check and a flap check.  They both do
their job.  Neither one leaks when the water is shut off.  I like the
flap valve better because it is totally silent where as the ball valve
rattles around similar to an agitator ball in spray paint cans.  Rumor
has it that flap valves break after a while.  I've had mine for 1 3/4
years with no problems.
-- 
Keith Rogers
Evans & Sutherland Computer Corp.
krogers-at-javelin.sim.es.com


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