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Brass backflow quick-connect adapter with three fittings and spare O-rings

Midwest Instrument

Midwest Instrument 110703 Backflow Quick Connect 1/2in NPT x 1/4in bathware

SKU CH-M6BN-QPBKW

Backflow quick-connect adapter with three 1/2 in. NPT to 1/4 in. flare fittings and spare O-rings

  • Quick backflow testing with three 1/2 in NPT quick-connect adapters included
  • Secure flare seal using the three spare O-rings supplied
  • Direct compatibility with Grainger test kits 34CU33, 34CU34, 34CU35 and 6AJV6
  • Ready-to-use kit eliminates extra parts sourcing for installers
  • New condition ensures reliable performance on every job

Backflow Quick Connect Adapter

The Midwest Instrument 110703 backflow quick connect adapter is a bathware component designed to link a 1/2 inch NPT connection to a 1/4 inch flare fitting. It serves plumbing professionals and maintenance teams who need a reliable backflow prevention connection for compatible test kits or assemblies.

Simple thread engagement with spare seals

Installation requires threading the NPT end into the matching port and tightening the flare connection against the supplied O-ring. The package includes three spare O-rings so worn seals can be replaced immediately without sourcing separate parts, reducing the chance of leaks during reassembly.

Limited to listed Grainger test kit models

This adapter is confirmed for use only with Grainger items 33, 34, 35 and 6AJV6, so it will not fit other thread profiles or flare sizes. Buyers needing different NPT or flare dimensions, or a configuration not listed, must select an alternative fitting.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $84.99
Pricier than about 70% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameMIDWEST INSTRUMENT
Product typeOther

Questions about this item

How do I verify the 1/2in NPT x 1/4in flare connections seal properly after installing the 110703 adapter?

Pressurise the line and check each of the three quick-connect joints for leaks; the included spare O-rings let you replace any seal that weeps.

What components come with the 110703 kit and what must I supply myself?

The box contains three 1/2in NPT quick-connect adapters with 1/4in flare ends and three spare O-rings; you provide the mating Grainger items 34CU33, 34CU34 or 34CU35 and pipe thread sealant.

Which version of the 110703 should I choose for a 1/4in flare mating fitting?

The 110703 is a single configuration — 1/2in NPT by 1/4in flare — so select this model when your system uses that exact thread and flare size.

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