AquaMatic K521-PC 1" Solvent Weld Adaptor (Pair) | Part 1070226

The AquaMatic K521-PC Adaptor Kit (Manufacturer Part Number: 1070226) is a factory-original pair of 1-inch male socket weld (solvent weld) adapters engineered exclusively for AquaMatic K521 Series composite body diaphragm valves.

This high-quality PVC grooved adapter kit provides a secure, permanent, and leak-free fusion connection between your commercial or industrial plastic piping system and your K521 control valves. By using a solvent weld (glue-in) configuration, this kit eliminates the risk of thread-stripping or weeping seals common with traditional threaded connections.

Important Connection Requirement: These adapters feature the specialized AquaMatic grooved flange profile and require either a K521-109 or K521-111 Retaining Ring and Nut Assembly to mechanically clamp and seal the adapter pair securely to the valve body.

Parts Included List

To complete a full valve installation, one kit is required per valve. This kit includes:

• 2 x K521-PC 1" Male Socket Weld Adapters: Precision-moulded PVC connectors featuring the specialized AquaMatic exterior grooved alignment profile on one side and a standard 1" slip/socket connection on the other.

Note: The required K521-109 or K521-111 retaining rings, nuts, and internal elastomer O-rings are sold separately.

Key Features & Benefits

• Seamless 1" Pipe Integration: Allows effortless jointing directly to standard 1-inch rigid PVC pressure pipes using standard solvent cement.

• Corrosion-Proof PVC Construction: Perfectly matches the chemical-resistance profile of the K521 composite valve body—ideal for harsh deionized water, acids, caustics, and water treatment chemicals.

• Leak-Free Joint Security: Permanent solvent cementing distributes pressure evenly across the pipe joint, preventing stress cracking and loosening caused by system vibration or pressure spikes.

• Genuine OEM Tolerances: Manufactured by AqMatic / Pentair to rigorous industrial design specifications, ensuring perfect concentricity and a snug pipe fitment.

Technical Specifications

Applications & Systems

The K521-PC solvent weld adapters are the ideal option for clean, professional plumbing in permanent commercial installations where threaded fittings are prone to chemical weeping or mechanical loosening. They are widely used in:

• Industrial water softeners and commercial multimedia sand/carbon filters.

• Demineralizers and pure water distribution loops (RO/DI treatment plants).

• Aquatic facilities, commercial boiler feed lines, and cooling tower water treatment.

Installation Note: Slide your chosen K521-109 or K521-111 retaining nut and split ring onto the pipe/adapter before solvent welding the adapter to the pipe. Ensure the specialized grooved face is completely clean and aligned correctly with the valve's sealing ring before tightening the nut. Always use a high-quality PVC primer and solvent cement, allowing the joints to cure completely according to the manufacturer's directions before pressurizing the line.