Re: Drain Pump for sinks???
In this application, a check valve would perform the same function as an antisiphon valve.
An antisiphon valve has the additional funcion of admitting air into the line when there is a vacuum. It's not needed in this scenario.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.