Let me show you how we did the under slab plumbing for this building.
I used strings and stakes to show where the walls would go, that way the plumbers would know where to run their pipes.
Everything laid off nicely- starting at the sleeve in the foundation the 3’’ drain line first caught the water fountains, then the kitchenette and the first bathroom sink, next the second bathroom sink. We “L’d” over to the toilets in both bathrooms, and “Y’d” off with 2” pipe for both floor drains.
We also crossed over with a 2” line to the mop sink.
Everything drains towards the front of the building where it will tie into the street.
I used a mini excavator with a one-foot bucket to dig the deepest part.
I taped a one-inch block at the end of my 4’ level that way I can check to see if I have a ¼” fall as I dig my ditch.
The plumbers start at the front of the building where the ditch is the deepest and work their way up, making sure to prime and glue every joint.
They had to do some hand digging and adjust the ditch to make sure they maintained the correct fall.
You can see here where they put in one of the floor drains.
They glued on test caps, and I used a pump and tank in the back of my truck to fill the entire system with water for inspection.
We filled this 10' tall pipe all the way to the top with water.
Here’s the layout: this two-inch electrical conduit goes from the sub-panel to the main service.
Then a floor drain for the water heater, and the ¾” water line that comes in from the outside of the building.
Next a vent pipe for the floor drain.
This is the stub up for the toilet for the first bathroom, sink drain, toilet for second bathroom, floor drain for the HVAC system, another vent for the drain, and the second bathroom sink and the kitchenette sink drain.
Here’s where we branched off with a 2” line for the mop sink, then there’s a drain for the high and low water fountains.
Finally, through the foundation sleeve to the outside.
We put the water line in conduit and you can see where it exits under the footer below the frostline.
This is a second water line that will go to the other end of the building.
After inspection I use my laser level to mark the top of the concrete floor on the drain then the plumbers cut an additional inch off. This way after they glue the drain on it will be a ½” lower than the floor.
We cover the drains with tape, so no concrete gets in them.
I take my rake and start filling in around the pipes- I had left all the joints uncovered for the inspector to see. That we he knew everything was primed and glued.
I used my Ventrac to get rid of some of the bigger rocks that were in the way, and brought a couple scoops of gravel back to fill in where dirt had been taken out.
Everything is graded back level and smooth- now we’re ready to put down vapor barrier and rebar. @hausplans
#construction #building #build #howto #underslab #plumbing #diy #contractor
Негізгі бет How-To Under Slab Plumbing
Пікірлер: 20