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Started By
Message
How much do Pex 90's restrict flow?
Posted on 1/23/23 at 8:37 pm
Posted on 1/23/23 at 8:37 pm
I'm having the same old issue with weak water pressure at my house, specifically when trying to run 2 faucets/showers/spigots at one time. Water pressure and flow at the pump are excellent.
My setup goes Pump-->1" PVC-->3/4" Pex-->Pex 90-->Into house.
I'm wondering if that 3/4" 90 is restricting me too much at inlet to the house, and would replacing it with a 1" 90 help?
My setup goes Pump-->1" PVC-->3/4" Pex-->Pex 90-->Into house.
I'm wondering if that 3/4" 90 is restricting me too much at inlet to the house, and would replacing it with a 1" 90 help?
7
Posted on 1/23/23 at 8:38 pm to indytiger
Pressure reducer/ strainer clogged?
Posted on 1/23/23 at 8:55 pm to East Coast Band
There's no strainer/pressure reducer/filter on my main line.
I don't think any of the individual fixtures are clogged b/c this is an issue with everything. Running shower1, can't get barely anything out of shower2/toilet1/sink3/etc and vice versa.
I don't think any of the individual fixtures are clogged b/c this is an issue with everything. Running shower1, can't get barely anything out of shower2/toilet1/sink3/etc and vice versa.
Posted on 1/23/23 at 9:21 pm to indytiger
What kind of PEX 90?
Posted on 1/23/23 at 10:50 pm to indytiger
A 3/4” metal PEX 90 is equivalent to about 10 ft of additional piping. A plastic 90 is equivalent to 16 ft of piping.
Source: Uponor Catalog
Source: Uponor Catalog
Posted on 1/24/23 at 2:51 am to indytiger
There are two types of Pex - A and B. Can't remember which is which, but my understanding is that fittings for one of them don't effectively reduce the size of the tubing. However, the other one effectively reduces the tubing by one size. In other words, that kind of 3/4" fitting has roughly the interior diameter of a copper 1/2" fitting.
But it sounds like you may have other problems than that one fitting.
But it sounds like you may have other problems than that one fitting.
Posted on 1/24/23 at 6:18 am to indytiger
Contact water Dept. Depending on where you are on the line could be your problem. How far from the pump you are meaning. I'm the last house on the line, but great water pressure, end of line beginning of lines have best pressure.
Posted on 1/24/23 at 6:33 am to welder69
quote:
Contact water Dept. Depending on where you are on the line could be your problem. How far from the pump you are meaning.
What pump?
Posted on 1/24/23 at 7:21 am to VABCHTIGER
quote:
There are two types of Pex - A and B.
Pex A is the one that is flexible and uses the milwaukee expander tool to connect the fittings. This is less restrictive to flow
Pex B is the typical pex that uses brass or metal bands to connect the fittings. Crimp or clamp fittings for pex B
Posted on 1/24/23 at 8:53 am to indytiger
Is this loss happening through any two valves or just the shower(s)?
If so is there any PEX in the shower drop? The down water line from shower valve. Have run into problems with such a setup and some shower faucets.
If so is there any PEX in the shower drop? The down water line from shower valve. Have run into problems with such a setup and some shower faucets.
Posted on 1/24/23 at 11:42 am to indytiger
quote:
My setup goes Pump-->1" PVC-->3/4" Pex-->Pex 90-->Into house.
What are the lengths of each? the 3/4" Pex line, if it is 20 feet or longer will give you more pressure drop than the 3/4 Pex 90.
Is this a new problem? Did something change if it is?
Posted on 1/24/23 at 2:01 pm to PSU2LSU
More accurate to state PEX pipes certified to ASTM F1960 for PEX ring expansion systems as there are PEX-A and PEX-B tubing rated for that. Zurn PEX is PEX-B but can be used with F1960 as an example.
Posted on 1/24/23 at 5:42 pm to awestruck
quote:
Is this loss happening through any two valves or just the shower(s)?
Any 2. If I've got master shower going, won't get much pressure at any sink, shower, toilet.
Not a new problem. Moved here a year ago, it has just been annoying me extra as of late. The whole house is 3/4 main trunks (attic) and 1/2 down lines to all fixtures. Everything is probably undersized for this size of a house.
Posted on 1/24/23 at 5:45 pm to mdomingue
quote:
My setup goes Pump-->1" PVC-->3/4" Pex-->Pex 90-->Into house.
What are the lengths of each? the 3/4" Pex line, if it is 20 feet or longer will give you more pressure drop than the 3/4 Pex 90.
It is a very short run, less than 8 feet from the discharge of my pump to where the pex goes into the wall. This particular 90 I'm asking about would be the first restriction, so thats why I'm curious about it.
Posted on 1/24/23 at 8:12 pm to indytiger
I would say it sound like the bigger problem is it sounds like your whole house is being fed by a 3/4 pex. I don't even think pex-a would be sufficient much less crimp pex which is what sounds like you probably have.
Posted on 1/24/23 at 8:19 pm to VABCHTIGER
Pex is 1/8 smaller ID then the pipe you're using.1/2 pipe is 3/8
If you are using uponor/ expandable pex the ID is a true size 3/4 is 3/4
If you are using uponor/ expandable pex the ID is a true size 3/4 is 3/4
Posted on 1/24/23 at 11:53 pm to Turnblad85
quote:
I would say it sound like the bigger problem is it sounds like your whole house is being fed by a 3/4 pex.
What size are normal supply lines and main trunks on houses?
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