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The ASHLAND WATER GROUP AV25 is a chrome and zinc plated air valve designed to admit air into residential well water systems. This fitting controls air admittance within the well system piping, supporting proper pressure function and preventing vacuum conditions that can disrupt water flow. It is a small but critical component for licensed plumbers and well service technicians working on private well installations. At 0.25 inch sizing, it fits standard quarter-inch porting found in common well system configurations. Weighing 0.49 pounds, it is a compact, single-piece valve suited for straightforward installation.
The AV25 is used in private well water supply systems where controlled air admittance is required to maintain pressure balance. It is a direct-install component appropriate for residential well pump systems, pressure tank assemblies, and related plumbing lines. Plumbers and well service technicians typically install this valve during new system construction or as a replacement on existing assemblies. Its chrome and zinc plated finish provides corrosion resistance in wet service environments.
Designed as an OEM-style replacement air valve for residential well water systems requiring 0.25 inch air admittance fittings.
Installation should be performed by a licensed plumber or qualified well service technician in accordance with applicable local plumbing codes. Shut off the well pump and relieve system pressure before removing or installing any fittings. Inspect threads and mating surfaces before installation to ensure a proper seal. Do not overtighten; use appropriate thread sealant rated for potable water service where required by code.
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