Astralpool / Hurlcon 40mm Barrel Union - HX, JX, 40mm MPV

Astralpool / Hurlcon 40mm Barrel Union - HX, JX, 40mm MPV

Plumbing Pipe Unions to suit Hurlcon & Astralpool JX and HX gas heaters & 40mm filters. These are much stronger than the old style unions found on equipment years ago. The nut is much thicker. Comes with nut, tail and o'ring. This does not suit MX, Viron, HiNRG, most pumps.

• Physically Stocked, unlike most "drop-shipping" websites.
• Shipped from VIC, NSW, WA, QLD

Astralpool 40mm Heater Barrel Union - Suits HX / JX / WX heaters & some Hurlcon pumps from the 1990s.

Suits: HX 70, HX 120, HX 150, WX, JX 130, JX 160 gas spa heaters.
Dimensions: 57mm inner lip. For 40mm plumbing. Part number 78309.

Does NOT suit Hurlcon / Astralpool Pumps, Filters, MX, Viron, HiNRG, ICI Heaters. For 50mm unions, you will need these.
Full Union Set includes 1 Nut, 1 Tail, 1 O-ring

Manufacturer Catalogues, Diagrams & Part Numbers

Need exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues: Astralpool Catalogue 2026 | Zodiac Catalogue 2026

Interactive Parts Diagrams

Find this part on our interactive heater parts diagrams — each one opens the full exploded view and parts list:

• Astralpool / Hurlcon HX 120 Gas Heater — Diagram & Parts