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Manufacturer Resources
Product Specs
- Body Material:
- FRPP
- Connection Type:
- No Hub
- Fitting Name:
- Reducing 90 Degree Tee
- Series:
- R90T
- Wall Thickness:
- 0.24 IN
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- General Valve
- Pipe Size Dimension:
- 4 x 2 IN
Watts 710315 – Frequently Asked Questions
1) What size branch does the Watts 710315 reducing tee take?
The 710315 is a 4 x 2 inch reducing tee: a 4 inch run with a 2 inch branch coming off at 90 degrees. Use it where a 2 inch fixture or lab waste line ties into a 4 inch main. If you need the branch to stay 4 inch, this is the wrong fitting, you want a straight 4 inch tee.
2) How does the Watts 710315 tee join to the pipe, solvent weld or mechanical?
Mechanical. It is a No Hub fitting, so the spigot ends are plain and the joint is made with no-hub couplings (band and shield) rather than solvent cement, fusion, or threads. Budget one coupling per connection, three for this tee, since none are included with the fitting itself.
3) Is the Watts Blueline 710315 tee plastic or cast iron?
Plastic. The body is FRPP, flame retardant polypropylene, part of the Watts Blueline R90T series. It is a chemical waste drainage fitting, not a DWV cast iron or PVC fitting, so it belongs on lab and industrial acid waste systems where the drain line has to take corrosive effluent.
4) Can I mix a no-hub FRPP tee into an existing cast iron 4 inch drain line?
Mechanically, no-hub couplings are the joining method on both cast iron and this FRPP fitting, so the ends land in the same family. What decides it is the application: the 710315 is a Blueline chemical waste fitting in flame retardant polypropylene, and it is specified where the waste stream is corrosive. Transitions between different drainage materials need to be made per the approved system detail rather than assumed, so confirm the crossover point with the engineer on the job.
5) What is the wall thickness on the Watts 710315 chemical waste tee?
0.24 inch. That wall governs whether the fitting matches the schedule of the FRPP pipe and fittings already on the system, so check it against the rest of the Blueline run before you cut in, mixing wall thicknesses on a no-hub chemical waste system causes grief at the coupling.
6) Do I need to worry about orientation or flow direction when installing a 4x2 reducing tee?
Yes. A 90 degree reducing tee is directional: the 4 inch run carries the flow and the 2 inch branch enters it. Set the branch so the incoming waste turns with the flow in the main, not against it, and keep the fitting on the correct grade for the drain. Reversing a sanitary branch is the most common field error on this type of fitting.
7) What is the Watts part number and series I should quote for a 4x2 no-hub Blueline tee?
Order Watts 710315, series R90T. That designation covers the 4 x 2 inch, 90 degree, no hub reducing tee in FRPP Blueline. Use the full number when cross-referencing, since the R90T series spans multiple sizes and only 710315 is the 4 x 2.
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Does the Watts 710315 come with a warranty?
Absolutely. The Watts 710315 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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