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
Pair of Legend Valve 3/4 inch FNPT adapters for Body A

Legend Valve

Legend Valve 800-874F Adapter 3/4 FNPT Pair Body A

SKU CH-7WMN-PKK7M

Pair of 3/4" FNPT LegendConnect adapters for Body A radiator connections

  • LegendConnect adapter pair fits Body A radiators
  • 3/4 inch FNPT threads connect to standard piping
  • LEGEND VALVE brand ensures manufacturing quality
  • California Proposition 65 warning for chemical awareness
  • Sold as a pair for complete installation

Valve Adapter Pair

The Legend Valve 800-874F adapter provides a 3/4 inch FNPT connection for Body A radiator components. This new pair joins the body to piping in hydronic heating installations. The brass construction suits boiler and radiator accessory requirements. It is intended for professional HVAC assembly.

Sustained System Operation

The adapter maintains a sealed joint while the system circulates hot water or steam through the radiator network. Thread engagement resists thermal cycling and pressure variation during continuous heating seasons. The connection remains reliable across repeated expansion and contraction cycles. No performance degradation is expected under normal hydronic conditions.

3/4 Inch FNPT Thread Specification

The single decisive specification is the 3/4 inch female national pipe thread size on each adapter. Buyers needing a different thread diameter or a male thread type cannot use this pair. The Body A designation also limits compatibility to that specific radiator body design. Verify both thread size and body match before ordering.

How it compares

Measured against everything we stock in Radiator Fans & Boiler Parts, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 87% of the 95 comparable items (median $25.99).

Specifications

Product
Brand nameLEGEND VALVE

Questions about this item

How much noise or heat does the Legend Valve 800-874F adapter produce when installed in a system running all day?

This brass adapter has no moving parts, electronics or power draw, so it generates no noise or heat of its own during continuous operation.

What existing piping or fittings must I already have for the LegendConnect 3/4" FNPT pair to work?

You need a Body A component with matching 3/4" FNPT threads and pipe thread sealant or tape to make the connections.

Will the Legend Valve 800-874F adapter fit older Legend Valve bodies that are not labelled Body A?

The adapters are made specifically for Body A; compatibility with other body types is not guaranteed by the manufacturer.

More in Radiator Fans & Boiler Parts

Similar items