After you have installed your new triple sink, you may want to consider how to plumb it. Consult with your local inspector or plumbing contractor to determine what local codes require. Triple sinks do provide a challenge, but with the right parts and a bit of plumbing experience, the job can be done. Triple-sink plumbing kits generally are available at hardware stores, though in some cases you may have to mix and match pieces to get a proper install.
Things You'll Need
- Pipe wrench
- Triple-sink PVC plumbing kit
- Flexible extension pieces (PVC)
- Extra PVC tail pieces
- P-trap kit
- Permanent marker
Turn off your supply valves underneath the sink. Place towels and buckets under the sink so you can catch any water once you begin to disassemble your old sink plumbing. Remove all the under-sink plumbing, using your pipe wrench. Remove all the pieces completely back to the wall outlet. You do not need to shut off your water supply.
Separate all the pieces that come in your triple-sink kit. The kit consists of two long elbow sections that will connect the left and right bowls, a center tee section that will connect the center drain, and two drain tailpiece sections.
Dry-fit all the horizontal sections of your PVC kit underneath the sink. This will include the two long elbow connections and the center tee section. Use a permanent marker to mark where they will need to be cut.
Cut the PVC pieces to fit with your hacksaw. Check to see where your wall drain is. Center-set drains will install directly to your p-trap kit with no additional pieces usually needed. Offset drains may require you to install your p-trap kit and then use a flexible drain extension to curve the drain around so it lines up with the wall outlet.
Install your PVC p-trap kit onto the bottom of the center-set tail piece. Line it up with the wall. Use the flexible tailpiece extension if needed as described in Step 5.
Install tailpiece extensions to the bottom of your sink drains if needed. Tighten down all connections and check for leaks. See the Tips section for connector instructions.
Tips & Warnings
- Under-sink PVC connections are all compression-fit. Slide back the threaded nut onto each PVC plumbing pipe. Place the compression washer onto the PVC pipe with the small side facing out. Tighten each nut.
- Photo Credit Jupiterimages/Polka Dot/Getty Images
Anatomy of a Kitchen Sink
The kitchen sink used to be a necessary evil where hours were spent washing dishes and pans, cleaning food and cleaning up....
Requirements for a Restaurant Bar Sink
All restaurants and other commercial food service establishments must comply with local, state and federal health and safety codes involving food. The...
Single Vs. Double Sink
Renovating your home gives you an opportunity to design your kitchen so that it fits your day-to-day needs. Choosing a single or...
How to Plumb a Kitchen Sink Yourself
Time for a new sink? Do a bit of research on kitchen plumbing, choose the sink you want and then check to...
How to Use a Three-Compartment Sink
Three-compartment sinks are used in many restaurants and food-service businesses for compliance with food safety regulatory guidelines. Such sinks have three individual...
How to: Plumbing for a Concession Trailer
Due to the possible health concerns in a mobile food service environment, the plumbing requirements for concession trailers should be addressed. While...
Under Sink Air Gap Installation
Air gaps create an outlet between waste water drain lines and appliances that discharge water, such as dishwashers and water filtration systems....
Procedures for a Three-Compartment Sink
In the food service industry, if you have walked into a kitchen where food is prepared for public consumption, then you have...