Low point drain valve question

2112 wrote:
A consumer grade pressure washer uses very little water flow. About a gallon/minute.

With that said, I interpret your question as you have shore water pressure and want to tap off the cold low point drain as a matter of convenience. If so, I'm confident you would get enough water pressure and flow to stay up with the washer.

Try it and let us know how well it works.

Good point on where the drain is. I was presuming low point tank drain. Although the OP did not specify. Didn't specify the gpm requirement of his pressure washer though either, so??
If a pressure line, then with water pressure from the pump or city connection will be sufficient.

That said, just try it real quick. If a gravity line provides enough water, you'll know it. If it doesn't, you'll know it.

And the pontification is strong here, considering the OP could have stuck the pex fitting on in about the same time it takes to walk inside, fire up the electronic device and ask the question. No?


And to these points, this is easy to figure out. Know the gpm of your pressure washer and measure the flow of your source. Turn on, fill a milk jug, that's your gallon/however many minutes or fractions of a minute it takes to fill.