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
Cast iron reducing companion flange, plain finish, flat face

Anvil

Anvil 308009802 Reducing Companion Flange Bathware

SKU CH-PDBT-NCGA6

Cast-iron reducing companion flange with a 10-inch outside diameter, Class 125 rating, 175 psi pressure limit and eight bolt holes

  • TypeOther
  • Cast-iron construction resists corrosion for long service life
  • Class 125 rating handles 175 psi working pressure safely
  • Reducing threaded connection joins 4 in pipe to smaller FNPT fitting
  • Flat-face design seals reliably across -20 to 150 °F range
  • Eight bolt holes simplify alignment and installation

Product Identity

The Anvil 308009802 is a cast-iron reducing companion flange built for flat-face piping systems. It connects a 4-inch nominal pipe to a female NPT thread in residential or light-commercial bath installations. The Class 125 rating suits standard water and low-pressure steam lines.

Upgrade Path

This flange replaces a worn or mismated flat-face connection where the bolt pattern or thread size no longer seals. The jump is worth it when the existing joint leaks at the gasket face or when a schedule change demands a 175 psi rating at up to 150 Degrees F. It is not for systems that require a raised-face flange or a higher pressure class.

Sustained Behaviour

Cast iron handles the rated 175 psi continuously from -20 Degrees F to 150 Degrees F without creep. The plain finish resists corrosion in treated water, and the eight-bolt pattern distributes load evenly during thermal cycles. It is not for applications exceeding the Class 125 temperature or pressure limits.

Highlights

  • Cast-iron construction resists corrosion for long service life
  • Class 125 rating handles 175 psi working pressure safely
  • Reducing threaded connection joins 4 in pipe to smaller FNPT fitting
  • Flat-face design seals reliably across -20 to 150 °F range
  • Eight bolt holes simplify alignment and installation

Specifications

BrandANVIL
TypeOther

Questions about this item

What bolt pattern does the 10 in flange use for mounting?

The flat flange has eight bolt holes for a Class 125 connection.

How do you seal the threaded end during installation?

Apply pipe-thread sealant to the FNPT threads and tighten to the manufacturer's torque value to prevent leaks at 175 psi.

When should the cast-iron flange be inspected or replaced?

Check for corrosion or cracking if the system cycles near 150 °F or after any pressure event above 175 psi.

Also in this aisle

People compared these

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