PVC Flex Tubing

[Kryten]

The other thing about that home depot stuff is that it really isn't all that flexible. It really likes to stay in the coil shape that it comes off the roll and it takes quite a bit of pressure to force it to do otherwise. Like enough to lift a hang-on overflow box up off the edge of your tank...

[Delphinus]

Ah .. there's a trick to that stuff. It needs to be heated and then its malleable, and will restiffen as it cools.

So for example to slip it on easily onto a hose barb, dip the end in hot water for about 10-20 seconds and then its workable.

The larger stuff (1.5" diameter) will even collapse on itself at the store, so you have to work on getting the length you need heated up and then you can open it up, hold it in place at the shape you want it and when it cools it will be good again.

[MikeP]

Originally Posted by digital-audiophile

I'll see Albert on the weekend then. I only really need a couple feet to come off my pump to the wall and then I am switching up to Sch.40 PVC up the back of the tank and into it. I just need the flex to come off the pump.

I'm planning on buying about 10 feet from Albert. That should be more than I need. If you can wait I might have that much left over. It's yours if you want to come by to pick it up.

[mark]

I'm using a combination of "spa-flex" and rigid PVC on my return, drains and CL.

Like said before, Spa-flex will match up to PVC fittings (elbow, tee's etc) and really is comparatively cheap.

[digital-audiophile]

I'll be using a rio 32HF internal pump and it has the option of the NPT thread off the pump or a hose barb. If using this spaflex would I need to use a female NPT tp PVC spiggot to fit this tubing? Then do you glue it with PVC primer/glue?

Thanks for all the help guys!

[Delphinus]

Think of spaflex as exactly the same as your rigid PVC, except that it bends. You wouldn't need a hose barb for it, just your regular PVC fittings.

Now, I have a Rio 32HF on my ritteri tank and I don't remember it having NPT thread option, I'll have to look at it again. I just used a 1' section of vinyl hose that slips over the output and then a hose barb and then into my return plumbing manifold. But if it does have the NPT option then you just need whatever adapter to fit into it. Either a MPT that threads right into it, or a FPT that the pump threads into, or you can use MPT with a close nipple if need be (might be the easier option if your using a bushing to step up the plumbing size, for example)..

[digital-audiophile]

Off the return on the pump there is a little slip adapter that fits in it that has an NPT thread on it, in the box there are two hose barb adapters, 3/4"/1" if I recall correctly that thread onto that small "nubbin" maybe I'll hit up western pump on Saturday with those pieces in hand to see what they suggest. I want to make it so I can easily disconnect the line from the pump as well so I can service it, without having to try to cut stuff apart to pull it out of the sump.


Maybe I'll snap a few pics when I get home tonight to illustrate what am trying to do.

[Quinster]

on all my plumbing I use at least a couple inches of Spa Flex on the inlet and outlet lines to help dampen vibrations, I also place either a union or a union valve for easy removal for cleaning.

[Delphinus]

A union like what Quinn has would work. I just don't remember anymore, but I could have done the vinyl tubing just because it's just as easy to remove if I need to clean the pump. But it doesn't slip off (or leak for that matter, not that it would matter much since it's in the sump) on its own, but it's just basically a low-tech alternative. If you ever want to pop by I could show you have I have it, shoot me a PM if you'd like to check it out. Or I could pop by and help you sometime...

[Canadbis]

I am using some of that braided flex tubing from Home Depot, and as stated by Tony, Heat it up and hold until cool. That is the only way to get the "perma bend" out of it. I have had no problems with leaks or kinks in it since I heated it. If I was to do it all again I would stick to the PVC solid tubing.
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