Value Brand 109-503 Anti Sweat Toilet Valve 1/2 In Brass
Brass anti-sweat toilet valve with anti-siphon function prevents condensation
- Anti-sweat design stops tank condensation
- Brass construction resists corrosion and wear
- Anti-siphon valve prevents water backflow
- 1/2 inch connection fits standard supply lines
- California Prop 65 chemical warning applies
What the valve does
The Value Brand 109-503 is an anti-sweat toilet valve designed to connect a cold-water supply line to a toilet cistern. By blending a small amount of hot water with the cold feed, it raises the inlet temperature enough to stop condensation forming on the tank exterior. It suits residential and light-commercial bathrooms where dripping tanks damage flooring or encourage mould.
Critical specification
The valve body is solid brass and the inlet connection is a 1/2-inch fitting. These two details decide whether the part matches existing pipework; no other dimensions or thread standards are provided. The unit also functions as an anti-siphon device, preventing backflow into the potable supply.
Installation notes
A plumber or competent DIYer can fit the valve using standard 1/2-inch supply connections and basic hand tools. The brass construction allows normal tightening torque without cracking. The only common issue is forgetting to run a hot-water line to the mixing port, which leaves the anti-sweat function inactive. California Proposition 65 warnings apply because the brass contains listed chemicals.
How it compares
Measured against everything we stock in Faucet Valves & Replacement Parts, at today’s prices. Recalculated every night.
- Price $26.99
- Cheaper than about 76% of the 1,132 comparable items (median $54.99).
Specifications
| Product | |
|---|---|
| Brand name | Zoro Select |
| Product type | Other |
Questions about this item
How does the anti-sweat valve stop condensation on the toilet tank?
The valve mixes a small amount of warm water with the cold supply so the tank surface stays above the dew point and moisture does not form.
What does the 1/2 inch brass connection mean for installation?
It fits standard 1/2 inch copper or threaded supply lines and the brass body resists corrosion in hard water.
What clearance is needed behind the toilet for the 109-503 valve body?
The compact brass housing requires only a few centimetres of space between the tank and wall for tightening.
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