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I am looking to plumb my filter ( a Rena XP3) into my tank with pvc or something like that to clean up the look of my tank. My question is this. Does anyone have a suggestion for an aquatic glue and primer to use or should I go with the standard construction grade stuff? Thanks for any and all input.

I am not sure about the saltwater side of things but the people who use PVC in freshwater stuff use the normal primer and cement.

55G Planted tank thread
19G Container Pond
[IMG]http://i4.photobucket.com/albums/y118/Wingsdlc/Ric

I'll second that Wings, also, if you look around closely at the "odd-ball" hardware stores, you can even find the clear PVC cement if you don't like the effects of blue or purple glue seams. The instructions say to let cure for 24 Hrs. before use, I'd suggest 48Hrs, give all the curing agents time to release all their chlorides and acetates, wash and rinse and rinse some more.
If you don't like the looks of the usual white- sch 40, gray sch 80, I'd really stay away from the brittle stuff that is a pale green, usually used for lawn sprinkler systems.
Here is a link to a place that stocks clear pvc pipe and fittings>>
http://www.usplastic.com/catalog/category.asp?catalog_name=USPlastic&category_name=54&Page=1

hope this helps

J.

yeah, if you are using cement for potable water you should be fine. the cement for drinking water shouldn't leech!

Thanks for the input. I guess I am going to have to pose another question. I Was told to make the intake bigger than the out flow for the sake of not burning out the pump. Would a 1" intake and a 5/8" out flow be pushing it or should I keep the pipe sizing relativly close?

You won't burn out a pump by restricting the intake unless you restrict it down to nothing. Super high powered pumps you might have to worry about cavitation damaging the impeller, but not in anything we're likely to use in a fish tank. Just go with whatever size the intake and outlet on the pump are instead of stuffing around with pipe size adapters.

I ended up pluming it with 1/2" pvc. I am really happy so far with the results. From the filter I used 3/4" I.D braided plastic/pvc pipe with gear clamps into a 3/4" garden hose x Female H.B. fitting. From that I tied into a quarter turn ball valve that is H.B. x 3/4". I used a 3/4" x 1/2" H.B. PVC adapter and then piped it accordingly. If I could do it for a living would. I thoroughly enjoyed doing it and would recommend doing it if you have the knownledge. I am a plumber by trade so it was fairly easy to do.