Captain O-Ring 6020018/350099 O-Ring Trio for Pentair Superflo Union

Product overview

The Captain O-Ring 6020018/350099 is a Buna-N seal crafted for reliable maintenance of pool and spa pumps. This three-pack provides ready-to-use replacements for compatible Pentair Superflo union fittings, helping you minimize downtime and keep your system running smoothly.

Compatibility and fit

Designed for 1-1/2" internal x 2" external slip unions, this O-ring matches the 350157 and 351157 Superflo union fittings found on Pentair SuperFlo and SuperMax pumps. Always verify against your system parts diagram to confirm compatibility before replacing.

• Fits Pentair 350157/351157 Superflo union fittings
• Intended for use with SuperFlo and SuperMax pool and spa pumps

Size and material details

The seal measures about 1.95" inside diameter, 2.26" outside diameter, and 0.14" thickness. It is made from Buna-N material, chosen for flexibility and chemical tolerance typical of pool care environments.

• O-ring part number: 6020018 / 350099
• Material: Buna-N

What you get

Includes three replacement o-rings to repair or service leaking fittings and to keep spare seals on hand for future maintenance. This trio helps you plan ahead and reduce unplanned downtime.

• Three O-rings in one pack
• Ready replacements for common unions

Quality and origin

Manufactured and warrantied by Captain O-Ring LLC, proudly assembled in the USA. The combination of careful fabrication and domestic assembly supports consistent quality across batches.

Practical tips for best results

Before replacing, check your system’s parts diagram to confirm part numbers. Clean grooves and inspect for damage to ensure a proper seal. Have spare rings on hand to minimize disruption during routine maintenance.

Why choose Captain O-Ring

This O-ring option emphasizes practical compatibility, durable material, and ready-to-use spares, making it a sensible choice for pool and spa professionals and enthusiasts who want straightforward maintenance without surprises.