AQBB GMX600NM Noryl Flange Valve Clamp for Hayward Pro-Series S144T–S360T2, 8–8.5in UV-Resistant Seal Kit

The AQBB GMX600NM Noryl Flange Valve Clamp secures the top-mounted multiport valve to the sand filter body, compressing the O-ring to create a durable water-tight seal.

If your Hayward Pro-Series sand filter with a ‘T’ suffix valve is showing leaks or loosening between the multi-way valve and the tank flange, this two-piece Noryl clamp is designed as a direct replacement to restore a secure mechanical connection. Made from weather-resistant Noryl and supplied with the bolts and square nuts needed for installation, the GMX600NM clamp works on 8 to 8.5-inch diameter sand cylinders and is engineered to resist sun exposure and temperature cycling.

Which Hayward Pro-Series models does this clamp work with?

The clamp fits Hayward Pro-Series sand filters that have the upper-mounted valve and the model suffix “T.” Confirm your model number before ordering. Compatible tanks include S144T through larger S360T2 variants listed in the compatibility section.

• Fits models: S144T, S164T, S166T, S180T
• Also fits: S210T, S210S, S220T, S220T2, S230T
• Higher capacity: S244T, S244T2, S244S, S270T2, S310T2, S360T2
• Designed for upper-body ‘T’ style sand cylinders with 8–8.5 in diameters

How do I install the GMX600NM flange valve clamp?

Installation is straightforward and intended for a homeowner or pool technician with basic tools. The kit includes the clamp halves plus bolts and square nuts; hand-start the fasteners, align the clamp around the flange, then tighten evenly with a wrench. Avoid overtightening to protect the flange and sealing ring.

• Place clamp halves around valve-to-tank flange connection
• Insert supplied bolts and square nuts, hand-tighten first
• Use a wrench to tighten evenly; stop before deforming parts
• Test under low pressure and inspect for leaks before full operation

What materials and durability can I expect from this clamp?

The GMX600NM is molded from Noryl, a thermoplastic known for outdoor durability and dimensional stability. It resists UV degradation and repeated thermal cycling so it maintains a firm hold despite pump vibration and weather exposure. The two-piece opening design delivers consistent compression across the sealing ring to minimize loosening over time.

• Noryl construction resists sun-induced aging
• Maintains shape through alternating cold and heat
• Two-piece clamp design prevents valve detachment
• Helps resist pump vibration and operational shocks

Will this clamp fit my sand filter or sand pump?

Measure the tank flange diameter and check your model number; the clamp fits sand cylinders with diameters roughly 8 to 8.5 inches and is not compatible with 12-inch pool sand pumps. Confirm the upper-body valve style and the model suffix before purchase to avoid misfit issues.

• Verify internal and external diameters before ordering
• Not suitable for 12-inch sand pumps or non-‘T’ style bodies
• Check your filter’s model label for the ‘T’ suffix
• Contact support with measurements if unsure

Who is this for: Pool owners or service technicians who need a reliable replacement clamp for Hayward Pro-Series sand filters with an upper-mounted multiport valve. Ideal when you have minor leaks, a loosening valve connection, or want to proactively replace an aged clamp to prevent downtime. Not intended for non-compatible models or 12-inch sand pump systems—measure and verify your model before purchase.