I thought it looked low too.
That was a picture sent to me by someone that was installing vessel sinks.
She is having drain problems related to the small grid drains.
Yeah, must be a tiny daycare bathroom.
I believe she said the work had been done by a "Handyman".
More drywall should have been cut, and the revent 6" higher then the vessel sinks.
The way some of them grid drains are constructed the sinks won't drain properly, they drain slowly then when enough head pressure builds up it dumps. Not sure if maybe the openings in the grid don't equal the cross section of the drain as required, but Ive run into that problem before.
Originally Posted by Terry
Regarding the the picture if the furthest sink was within 3 1/2 feet I would stack the tee's and wet vent the lower drain.
quote; Double vanity at a child daycare?
Codes do NOT make exceptions for a daycare center. What happens when it becomes an "adult facility" and the sinks are raised? That is why the code says, "42" or 6" above the sink rim, whichever is HIGHER", they are considering what COULD happen down the road, NOT what is happening now. The problem with grid stainers is that the openings are not large enough to allow the air to escape while the water is trying to flow into them. Inserting a straw into a hole or making the holes larger will permit full drain flow. The same thing happens with "rainfall" shower heads which are installed perfectly flat/horizontal. There are a lot of ways to do the drainage, depending on how much time and money he wants to use.