Ron Popeil Posted July 9, 2006 Share Posted July 9, 2006 are these what i want? http://www.marinedepot.com/md_viewItem.asp?idproduct=FT9044 or are there other products out there that work better? im looking for 3/4" slip and 1" slip check valves...help me find some! thank you! Quote Link to comment Share on other sites More sharing options...
Michael7979 Posted July 9, 2006 Share Posted July 9, 2006 I believe Advanced had some valves the other day when I was in there. Quote Link to comment Share on other sites More sharing options...
nu2reef-n Posted July 9, 2006 Share Posted July 9, 2006 Critter cabana out in Newberg has some also, don't know what size. What are you going to use them for? I've heard that they are unreliable, due to the fact that sponges and other growths can lodge in the flapper seat and not allow it to seal completely. I've never used a check valve so take my advice with a grain of salt;) Quote Link to comment Share on other sites More sharing options...
Guest Ahbrit Posted July 9, 2006 Share Posted July 9, 2006 i agree with Dave, and to add.....Flow will be reduced considerably you will have to clean these every week to have piece of mind Quote Link to comment Share on other sites More sharing options...
Ron Popeil Posted July 9, 2006 Author Share Posted July 9, 2006 well reduction of flow is something i dont want at all. i just wanted to decrease the amount of backflow of water from my sea swirls into my sump during a power failure. i wouldnt mind if they dont seal completely, as a trickle is better than a deluge of water. but if they cost me flow, then i cant say theyd be worth it.... thanks for the help guys. Quote Link to comment Share on other sites More sharing options...
madreef Posted July 9, 2006 Share Posted July 9, 2006 I have a very nice brand new 2" check valve, if any one is interested? Quote Link to comment Share on other sites More sharing options...
drock59 Posted July 9, 2006 Share Posted July 9, 2006 how about alternatives? Anybody have ideas on how to reduce the backflow to the sump? IF there are not alternatives, would it not be better to have them? Also, if you were to get a 1" or even 1 1/2" check valves and plumb them into your 3/4 tubing you would loose less flow, no? Quote Link to comment Share on other sites More sharing options...
Guest Ahbrit Posted July 9, 2006 Share Posted July 9, 2006 i agree with the point of having larger checkvalves. have a looksee at some of these things in HD or something. i believe they would still cause major turbulence in your plumbing design. turbulence = less flow Quote Link to comment Share on other sites More sharing options...
impur Posted July 9, 2006 Share Posted July 9, 2006 Can you just put the anti-siphon hole higher on the return plumbing? Then essentially all you have flowing back to the sump is whats in the pipes. Quote Link to comment Share on other sites More sharing options...
Ron Popeil Posted July 9, 2006 Author Share Posted July 9, 2006 i thought about this, but i dont know enough about it in order to implement it. if i have a pair of sea swirls that come together in a T...where would i put an anti siphon hole, and what would it look like? Quote Link to comment Share on other sites More sharing options...
Guest Ahbrit Posted July 9, 2006 Share Posted July 9, 2006 Everything i say is sounding negative today: be aware with those holes. they will fill will coraline algae in time. if the hole is to small it will not compensate for the gravity of the water. if the hole is too big, you will not be pleased Quote Link to comment Share on other sites More sharing options...
impur Posted July 9, 2006 Share Posted July 9, 2006 I drilled about 3/32" holes in my returns about 1/4" below the water. I don't get any coralline growing over the holes at all, but YMMV. Maybe it doesn't cover the hole because its out of the water for an hour or so each week when i do WCs. I've had this setup for 20 months or so. There is not a lot of water that comes out of the siphon hole either. Pic for ya. The hole is in that slot on the left. Its almost to the right end of that left side slot. Quote Link to comment Share on other sites More sharing options...
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