4 ms·
My water heater has one made from PEX. From memory, I would guess it adds about 18". With 3/4" PEX at a relatively slow 1.5 GPM flow rate, that adds about 1.4
by gregmac 7y ago
My water heater has one made from PEX. From memory, I would guess it adds about 18".
With 3/4" PEX at a relatively slow 1.5 GPM flow rate, that adds about 1.4 seconds to 'hot water delivery time', though that's not entirely accurate, because the loop itself has some heated water trapped in it.
- gpm 7y agoShouldn't you also adding the length of pipe/water you are preventing from being heated to that 18"?
- gregmac 7y agoI actually don't think so, because you end up with only a gradient of lukewarm-to-ambient temperature water, which you still have to purge in order to get actual hot water. Even if you're going for just warm water, you still have to purge some of it, then after a few seconds start continually adjusting cold until the hot water from the tank gets to you.