FAQ
FAQs
Q What pipe sizes are covered by F679?
A 18" to 48"
Q What is the difference between 7.5% deection and 5% deection?
A 7.5% deection is maximum amount of deection allowed by ASTM. The trade has adopted 5%
deection as the standard maximum deection allowed off “Base Inside Diameter”, which is a more
stringent test.
Q What is the difference between SDR 35 and SDR 26 pipe?
A Both pipes have the same outside diameter. SDR 35 has a thinner wall that SDR 26.
Q Does Cherne off a Mechanical Plug that can be used to block and ll with water a DWV
when conducting a rough-in test?
A Yes. the Iron Grip Plugs can be used for this application and comes in sizes 2", 3", 4", 6", 8", 10" and 12".
Q Does Cherne offer a plug that can be used to plug a bathtub waste and overow when
conducting a rough-in test?
A Yes. The #012678 Tub Plug Set.
Mechanical Test Plugs