Spa Pump Parts

Repair your spa or hot tub pump with individual spa pump replacement parts — O-rings, square rings, quad rings, diffusers, and wet ends for Jacuzzi, Aqua-Flo/Gecko, and generic spa pump platforms. PST Pool Supplies stocks the sealing and hydraulic components most frequently needed for spa pump service — starting from $9.30.

Spa pump seals, O-rings, and diffusers wear with time and heat cycling — replacing these components restores pump performance without replacing the entire motor assembly. The key parts in this collection: the Aqua-Flo/Gecko XP2/XP2E wet end (1.5ohp/2.0thp, 2\" MBT, 48-frame) is the complete hydraulic assembly for the XP2 pump — includes volute, impeller, mechanical seal, wear ring, suction cover, and hardware — an essential replacement when the pump leaks at the shaft or shows impeller damage. The Jacuzzi Magnum/Plus/Force diffuser (06016505R, 1.5–3.0hp) is the replacement vane diffuser for Jacuzzi Magnum series pump internals. O-rings in multiple sizes from Horizon Spa & Pool Parts cover the full range of spa pump seal points: the 10\" ID x 1/4\" cross section and 15-15/16\" ID x 5/16\" cross section O-rings seal large pump lid and volute joints; the 7-7/8\" ID, 7-1/4\" ID, 5-1/4\" ID, and 4-3/8\" ID rings address mid-size pump body seals; the 1-5/16\" ID x 3/32\" cross section handles smaller port and fitting seals. The Viton VT75 O-ring (7-1/4\" ID, 3/16\" cross section) provides chemical resistance for spa pumps operating in ozone or high-chemical environments where standard Buna-N degrades prematurely. Square rings and quad rings — the Jacuzzi Magnum diffuser square ring (O-462, part 47023254R), generic Buna-N square rings in 6-9/16\", 2-3/4\", and 2-5/8\" sizes, and the quad ring (2-11/16\" ID, 3/8\" cross section) — provide sealing for pump diffuser and volute assemblies where round O-rings would roll and leak.

When ordering pump O-rings and square rings, measure the existing ring's inner diameter (ID) and cross section (the thickness of the ring material) accurately — these two dimensions fully specify the ring. Buna-N (nitrile) is the standard material for most spa pump seals in chlorine and bromine water; Viton is appropriate for ozone, salt, or high-temperature applications. Never reuse an O-ring once removed from a high-pressure joint — always replace with a new ring during reassembly.

Shop spa pump parts at PST Pool Supplies and restore your hot tub pump to leak-free operation with the exact O-ring, diffuser, or wet end your system requires.