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Two white plastic Loc-Line 51821 hose adapters

Loc-Line

Loc-Line 51821 Adapter, Pack of 2

SKU CH-9N7Z-0ANG8 MPN 51821

Two 1/2 in. to 1/4 in. acetal copolymer drain adapters for connecting different hose sizes

  • Product typeDrain Components
  • Adapts 1/2 in. hose to 1/4 in. fittings
  • Acetal copolymer resists chemicals and heat
  • Pack of two speeds up plumbing jobs
  • Ready for immediate installation in new condition

1/2 in to 1/4 in Adapter Pack

This Loc-Line 51821 adapter connects 1/2 inch hose to 1/4 inch fittings in plumbing and coolant systems. Made from acetal copolymer for chemical resistance and durability. Supplied as a pack of two for spares or dual connections. Ideal for technicians adapting existing hose lines to smaller ports.

Replaces mismatched fittings

Use these adapters when joining 1/2 inch ID hose to 1/4 inch components without replacing the whole assembly. The jump is worth it when a reducer is cheaper and faster than re-plumbing. Not for buyers who need a straight coupler or a different thread standard.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 93% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameLoc-Line
Model name51821
Product typeDrain Components

Questions about this item

What hose inside diameter does the Loc-Line 51821 adapter accept?

The adapter fits a hose with a 1/2 in. inside diameter and reduces it to a 1/4 in. connection for the drain system.

How do I install the Loc-Line 51821 adapter without causing leaks?

Push the hose fully over the 1/2 in. barb until it seats against the body; the step most people miss is not seating it completely, which leaves a leak path.

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