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|  LF 3/4 pvc check value Quote: 
 I've a spare 3/4" union flapper type check valve which I can sell for $20. It's easily disassembled to clean if required. I used a pair of them on my 120g with no problems at all. PM me and I'll send you a picture of it. | 
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|   pmed you | 
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|   thanks Barry! | 
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|   You can get them at any plumping wholesaler I bought one today for $8 they work fine if installed right. |