We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black cast iron hex bushing with male and female NPT threads

Anvil

Anvil 0318908688 Hex Bushing Trap 3 1/2 in Male 1 1/4 in Female NPT Class 125

SKU CH-FK8N-4SBW5 MPN 0318908688

Cast iron hex bushing connects 3 1/2 inch male NPT to 1 1/4 inch female NPT, rated 175 psi at 150°F for Schedule 40 pipe

  • TypeDrain Components
  • Malleable iron construction resists corrosion in plumbing systems
  • Class 125 rating handles 175 psi at 150 °F service
  • 3-1/2 inch male to 1-1/4 inch female NPT adapts pipe sizes
  • Schedule 40 compatibility fits standard iron piping installations

Hex Bushing for Schedule 40 Pipe

This cast-iron hex bushing connects a 3 1/2 inch male NPT thread to a 1 1/4 inch female NPT thread. It is rated for Class 125 service and a maximum operating pressure of 175 psi at 150 degrees F. The fitting is designed for use with Schedule 40 pipe in plumbing and piping systems.

Suits installers reducing pipe size in threaded

Not for applications requiring a different pressure class or thread standard. Buyers needing other diameter combinations or material types should look at alternative fittings.

Highlights

  • Malleable iron construction resists corrosion in plumbing systems
  • Class 125 rating handles 175 psi at 150 °F service
  • 3-1/2 inch male to 1-1/4 inch female NPT adapts pipe sizes
  • Schedule 40 compatibility fits standard iron piping installations

Specifications

TypeDrain Components
BrandAnvil
Model0318908688

Questions about this item

How do I install the 3 1/2 in male NPT hex bushing, and what step do people often miss?

Wrap the male threads with PTFE tape or pipe dope, then tighten the 3 1/2 in male NPT end into the female fitting using a wrench on the hex flats; the step often missed is applying enough sealant to prevent leaks at the Class 125 joint.

What maintenance or replacement will the cast iron hex bushing need over time?

Inspect the 1 1/4 in female NPT threads periodically for corrosion or mineral buildup; replace the bushing if you see cracking, heavy rust, or if the 175 psi at 150 °F pressure seal begins to weep.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.