Glow-worm
Glow-worm Expansion Vessel 0020086356
Expansion vessel for the Glow-worm Envirosorb 14 air/water heat pump, absorbing system water expansion.
At a glance
- Appliance family: Envirosorb
- Also known as 1340074
£185.56
£154.63 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
This is an expansion vessel manufactured by Glow-worm, supplied under part number 0020086356. It is used on the Glow-worm Envirosorb 14 air/water heat pump, where it absorbs the increase in water volume as the system heats up and helps hold circuit pressure steady.
Signs this part needs replacing
- System pressure rises sharply once the heat pump runs and falls again when it cools.
- Pressure is repeatedly lost and the circuit needs frequent topping up.
- Water is present at the vessel's air valve when the valve core is depressed.
- The vessel feels heavy or full of water when disconnected and drained.
- The pressure relief valve discharges during normal running.
Before you order
- Confirm the appliance is an Envirosorb 14 air/water heat pump.
- Check the existing vessel's part number against 0020086356 before ordering.
- Inspect the vessel connection and mounting arrangement on your unit before removal.
- Check the system's air charge and operating pressure are set correctly after fitting.
Compliance
| Alternative numbers | 1340074 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| GLOWWORM ENVIROSORB 14 AIR/WATER HEAT PUMP | — | — | — |
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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