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Pex sizes gpm11/9/2022 ![]() ![]() Pressure testing requirements and procedures should be in compliance with local codes and PEX manufacturer’s instructions.Maximum working pressure indicates highest anticipated operating pressure.Pressure testing - Hot & Cold Water Plumbingģ times the maximum working pressure or a minimum of 40 psi, but no greater than 100 psi.ĭuration: 30 minutes minimum, 2 hours recommendedġ.5 times the maximum working pressure but no greater than pipe’s pressure rating at given temperature. Pressure testing - Hydronic & Radiant Heating Pressure ratings, testing and pressure drop PEX Tubing Pressure Ratings Exceptions are nominal sizes 1/2" and below. PEX made to US standards must comply with a SDR-9 (Standard Dimension Ratio), which is the ratio of OD (Outside Diameter) to pipe wall thickness (9:1).This is why push fittings can be used with all of these pipes. OD of PEX, copper and CPVC pipe with the same size (CTS) is the same.PEX tubing sizes are denoted by CTS (copper tubing size), not OD (Outside Diameter) or ID (Inside Diameter).Same data applies both to oxygen barrier and non-barrier PEX. Dimensional data is subject to manufacturing tolerances and may vary by brand. PowerPEX is the Sioux Chief brand for their F1960 things.* Numbers are approximate as per ASTM requirements. There also exists a compatible 3/4 PEX (F1960) to 1/2 NPT adapter, if that would be useful. But the amount of cooled down hot held in the 3/4 inch PEX will be small compared to the fill amount of water. 1/2 has the advantage that hot water will get to the tub sooner. That said, why not use 3/4 PEX? Being that it is a tub, either is going to fill it. That is also going through my water softener and cartridge filters. I peak out at 6 GPM when I fill a tank via 1/2 inch Wirsbo PEX. Just don't know if I'm over thinking things. I hate the idea of installing it and not being happy with it. I 'm just not sure on the wisest course of action. So much for installing this tub tomorrow. #Pex sizes gpm install#So while I could install delta faucets, for example, to do so I'd have to order a new drain from the OEM. The tub manufacturer is telling me that if I decide to use valves other than the fill & drain, that I will need to order the overflow and drain from them as its custom to the tub. So I'm trying to do everything I can get to get the best fill rate. The problem is, once this tub is installed in the concrete pad its not coming out and I won't know how it performs until after its installed. So I guess I'm back to trying to decide if I should run copper instead of the pex? I don't know if the 1/2" pex would reduce the GPM that much more over copper that its enough to worry about? In other words, I should expect more than 4.2 GPM providing my plumbing will put out more than that. #Pex sizes gpm full#They said if I remove them and install the full flow aerators that they sent in a bag, that it will then flow however much water my plumbing system puts out. So I called the fill drain manufacturer and they told me the drain comes with aerators installed. I want to make sure it performs well and they don't have to wait forever for it to fill.ĭo you recommend I consider something other than the combination drain and fill? This tub is in a bed and breakfast so it will be used by guests. I've not installed any of this yet so if I need to change directions now is the time to do it. Then 1/2" from the valve to a Tee where the other valve would tie in and then a single 1/2 pex to the filler. The 3/4" supply lines would be reduced to 1/2" going to the valve. I was opting for pex as an easier install. I cannot mount the valves on the tub deck (which is already tiled) So basically, around the corner from the valves. You can see that in the bottom center of the photo. Then I have to run piping from the valves to the long side of the tub where the combination drain and filler is located. In the photo above, they would be located on the right side where the hump sticks out. I have to drill holes and mount the valves on the short end of the tub. I have 3/4 pex run right to the framing where the tub will sit. ![]()
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