SRC Member surfedelic Posted June 16, 2004 SRC Member Share Posted June 16, 2004 I am currently looking for check valves. Come across those ball type - and was quoted 20 bucks for one. Anybody using this ? and how reliable are they. It would be great if you could share with me where you got them and for how much. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
xiggie Posted June 17, 2004 Share Posted June 17, 2004 what do u wanna use it for? Quote Stairway to Heaven Link to comment Share on other sites More sharing options...
SRC Member surfedelic Posted June 17, 2004 Author SRC Member Share Posted June 17, 2004 The main purpose is to have the check valve on the return and also some piping work to ease my water changing task. If possible fully automated with solenoid for water changin -- that's my dream. Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted June 17, 2004 SRC Member Share Posted June 17, 2004 i was quoted 30+ for ball types.... where u get urs? Quote Link to comment Share on other sites More sharing options...
popcorn m3 Posted June 21, 2004 Share Posted June 21, 2004 I am currently looking for check valves. Come across those ball type - and was quoted 20 bucks for one. Anybody using this ? and how reliable are they. It would be great if you could share with me where you got them and for how much. Thanks in advance. pvc or brass? Quote Link to comment Share on other sites More sharing options...
SRC Member typrobin Posted June 21, 2004 SRC Member Share Posted June 21, 2004 y not juz get a union ball valve...when u are changing water, shut the valve loh... anyway, wat i heard is that ball valve only reduces the back flow...it doesn't completely shut it down... Quote MY OLD 3ft!! My Latest Plan!! Link to comment Share on other sites More sharing options...
SRC Member Nic a Jon Posted June 29, 2004 SRC Member Share Posted June 29, 2004 hihi Anyone know when using a checkvalve, how many percent of the flow from return pump to main tank is reduced? And what type of good checkvalve available ( price and where to get them). I have seen OB selling those pvc ones at $6-10..are they good? Quote Link to comment Share on other sites More sharing options...
SRC Member weisoon Posted June 29, 2004 SRC Member Share Posted June 29, 2004 The water from the pump has to push against either a spring or a weight so that in event of pump failure or off in purpose then the spring/weight return to normal position to close the valve. Further, if you look closely at the internal channel of a Y-check, it is angled, so more head loss. Best is to avoid it if possible and they do not give a perfect fit after some time due to slime coating of the rubber gaskets. Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted June 30, 2004 SRC Member Share Posted June 30, 2004 The water from the pump has to push against either a spring or a weight so that in event of pump failure or off in purpose then the spring/weight return to normal position to close the valve. Further, if you look closely at the internal channel of a Y-check, it is angled, so more head loss. Best is to avoid it if possible and they do not give a perfect fit after some time due to slime coating of the rubber gaskets. hm... i think the spring type will cause severe head loss... go for ball types but each cost 30+ bucks! Quote Link to comment Share on other sites More sharing options...
SRC Member surfedelic Posted June 30, 2004 Author SRC Member Share Posted June 30, 2004 hm... i think the spring type will cause severe head loss... go for ball types but each cost 30+ bucks! You can get itt from Hai cheong at kallang. They are selling 25bucks Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted June 30, 2004 SRC Member Share Posted June 30, 2004 You can get itt from Hai cheong at kallang. They are selling 25bucks Thanks for the tip bro... but what size is that by the way? Quote Link to comment Share on other sites More sharing options...
SRC Member surfedelic Posted June 30, 2004 Author SRC Member Share Posted June 30, 2004 I think it is the 1.5 inch ones. Maybe too big for you. Quote Link to comment Share on other sites More sharing options...
SRC Member Nic a Jon Posted June 30, 2004 SRC Member Share Posted June 30, 2004 Just call Hai Cheong, 16mm or 1/2 inch check valve (ball type) $20.50 that's the smallest size. Anyone knows is there alot of head loss with this type of check valve , and is it better to place it further away from returm pump or nearer for min head loss Quote Link to comment Share on other sites More sharing options...
weileong Posted June 30, 2004 Share Posted June 30, 2004 If you're worried abt head lost then get a larger sized one like 3/4" or 1" then use reducers. Quote Weileong's 4ft tank Part I Weileong's 4ft tank Part II Link to comment Share on other sites More sharing options...
SRC Member thc Posted July 1, 2004 SRC Member Share Posted July 1, 2004 i've just got two 1" ball check valve from Hxx Cxxxxx, it cost $26 each. Have installed it for my friend, the head lost is not noticable. Quote Link to comment Share on other sites More sharing options...
amteo Posted July 1, 2004 Share Posted July 1, 2004 Just call Hai Cheong, 16mm or 1/2 inch check valve (ball type) $20.50 that's the smallest size. Can you post the address? I also might add one to prevent backflow during power failure!! Quote Waste no more time arguing what a good man should be, be one. Marcus Aurelius Link to comment Share on other sites More sharing options...
SRC Member surfedelic Posted July 1, 2004 Author SRC Member Share Posted July 1, 2004 Pm you. Quote Link to comment Share on other sites More sharing options...
SRC Member Creetin Posted October 29, 2004 SRC Member Share Posted October 29, 2004 have to dig this thread up.... i am thinking of putting a check valve on a 25mm pipe. do they have this size? Quote Get Paid To Read Emails. Free To Join Now! http://www.emailcashpro.com/?r=okdk11 Link to comment Share on other sites More sharing options...
SRC Member thc Posted October 30, 2004 SRC Member Share Posted October 30, 2004 25mm = 1" check valve (grey pvc) .....It's available. Juz call them before going down to cfm stock holding. Quote Link to comment Share on other sites More sharing options...
SRC Member Nirvani Posted November 8, 2004 SRC Member Share Posted November 8, 2004 I'm selling my check valve..... I bought and glued the pipes then realised I forgot to put it in ; PM me. Brand new and selling for $25. Quote Link to comment Share on other sites More sharing options...
SRC Member yazid Posted December 14, 2004 SRC Member Share Posted December 14, 2004 Is Hai Cheong check valve clear type with true union? CLEAR PVC SWING CHECK VALVE WITH TRUE UNION Quote Link to comment Share on other sites More sharing options...
weileong Posted December 14, 2004 Share Posted December 14, 2004 Yes true union but not clear swing type. Quote Weileong's 4ft tank Part I Weileong's 4ft tank Part II Link to comment Share on other sites More sharing options...
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