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Old 10-13-2009, 09:40 PM   #1
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3/4" Pex - Is there a trick?


I love pex. I've used it several time w/great success. Nice long runs, no connectors to worry about, what could be better? However, I've always used 1/2" pex. I've found 1/2" pex to be about as hard to bend to my will as 12ga wire... that is rather simple.

I now realize that there's a reason for the manifolds everyone uses w/pex. It has nothing to do with home runs or a single spot for all the valves, it's so no one has to use 3/4" pex! I surrender! Maybe Bill Bixby (when he's angry!) could do it, but I sure as hell can't make nice tight turns with 3/4" pex.

Any tricks?

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Old 10-13-2009, 11:54 PM   #2
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3/4" Pex - Is there a trick?


You don't try to bend 3/4 inch into a tight turn, you use a 90 degree fitting.

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Old 10-14-2009, 11:46 PM   #3
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3/4" Pex - Is there a trick?


I'm discovering that. New crimp tool and all. :-) Still, 1/2" is much nicer than 3/4". I can't imagine 1"!
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Old 10-15-2009, 12:30 PM   #4
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3/4" Pex - Is there a trick?


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Originally Posted by WaldenL View Post
I'm discovering that. New crimp tool and all. :-) Still, 1/2" is much nicer than 3/4". I can't imagine 1"!

Are you using the 90 degree radius fittings that clip on the pex? They help, but it is still hard to bend it into that radius to fit the fitting.

Another trick is to heat the fat pex up using a blow drier, it makes it softer. When it cools down it hardens back up. Make sure you heat it uniform or you'll kink it.
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Old 10-15-2009, 12:43 PM   #5
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3/4" Pex - Is there a trick?


Quote:
Originally Posted by zootjeff View Post
Are you using the 90 degree radius fittings that clip on the pex? They help, but it is still hard to bend it into that radius to fit the fitting.

Another trick is to heat the fat pex up using a blow drier, it makes it softer. When it cools down it hardens back up. Make sure you heat it uniform or you'll kink it.
Got some heating water going through 3/4" last night. Amazing how much more pliable it is when warm. I'll give the blow drier a shot.

As for the 90* radius fittings that clip on... what 90* radius fittings? The only fittings I know of are the one where you cut the pex, something like the below, but I don't think that's what you mean.


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Old 10-15-2009, 06:05 PM   #6
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3/4" Pex - Is there a trick?


http://www.pexsupply.com/Wirsbo-Upon...port-2129000-p



3/4" Plastic Bend Support

SKU:A5150750
Brand: Wirsbo (Uponor)


From pexsupply.com under installation parts.
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Old 10-15-2009, 06:07 PM   #7
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3/4" Pex - Is there a trick?


Cool. Thanks.
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Old 10-15-2009, 06:32 PM   #8
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3/4" Pex - Is there a trick?


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Originally Posted by WaldenL View Post
Cool. Thanks.

Yaa, the bend supports are nice, they allow you to mount them or you can cut off the tab for mounting it. They keep the pressure drops to a min and less water hammer as the water doesn't have to change direction abruptly.

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