FAQ

Brass, Plastic & Commercial Tubular
FAQs
Q Do the brass tubular products come in different thicknesses?
A Yes. Our brass tubular products are offered in three different thicknesses (gauges).
• 17 gauge is the thickest, and is often referred to as commercial grade
• 20 gauge is our mid-range thickness
• 22 gauge is our thinnest, and is sometimes referred to as “budget grade”
Q How is the size of the tubular product determined for each application?
A The most common tubular product sizes are 1-1/4" and 1-1/2". These are available in brass and plastic products.
The trap adapter connection to the branch drain in the wall will determine the largest size of tubular product that
can be connected with a slip nut and washer. This point of connection can also be reduced for 1-1/4" tubular
assemblies with a reducing washer and slip nut. Bathroom sink installations are normally completed with 1-1/4"
products, but 1-1/2" products will work. Kitchen sink installations can only be completed with 1-1/2" products.
Q Are there tubular traps that can connect to a 2" iron pipe male thread?
A Yes. The N.Y. Code and L.A. Code traps are designed to work for this application.
Q Can the plastic tubular products be assembled with solvent cements instead of slip nuts/washers?
A No. The polypropylene materials cannot be assembled with solvent cements, they must be assembled
with the slip nuts/washers.
Q How is the dishwasher drain hose connected to the kitchen drain?
A If you have a disposal installed in your kitchen sink, the dishwasher drain can be connected to the 3/4"
drain port designed into every residential disposal. If a disposal is not available for a drain connection,
Oatey offers several styles of dishwasher branch tail pieces for this application.
Q Are Form-N-Fit Plastic Tubular products approved for installation on projects that require a
plumbing permit and or inspection?
A No. The Form-N-Fit is not approved for any installations that require a plumbing permits and or inspections.