Glow-Worm 20018487 O-Ring | Genuine Replacement Spare Part
- SKU
- EDDGLOWWORM094
Our Expert's Opinion
"A manufacturer approved O-ring that ensures reliable, watertight sealing under pressure.”Glow-Worm 20018487 O-Ring
The 20018487 O-Ring is manufactured to original equipment specifications, ensuring correct dimensions, material composition, and compatibility with the boiler’s system pressures and temperatures. Although deceptively simple, this small component plays an essential role in maintaining the boiler’s overall reliability and durability: even minor seal failures can lead to water leaks, pressure loss, component corrosion, or the activation of safety shutdown features designed to protect the system. A robust OEM O-ring crafted to the right tolerances helps avoid these issues and contributes to long-term boiler stability.
Over time, O-rings can degrade due to repeated thermal cycling, pressure fluctuations, and exposure to treated water chemicals, causing them to harden, crack, or lose elasticity. These wear patterns can be gradual and not immediately obvious, yet they can still allow slow leaks that reduce system efficiency and place additional strain on pumps, valves, and expansions vessels. Replacing a worn or damaged seal with this genuine Glow-Worm part restores a reliable, watertight connection, improves hydraulic integrity, and helps prolong the service life of the boiler’s internal circuits. Installation should always be performed by a qualified heating engineer to ensure correct placement, proper sealing, and full compliance with safety and performance standards.
Glow-Worm provide a 1 year warranty on all spare parts. Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 20018487 |
|---|---|
| Product Code | EDDGLOWWORM094 |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Glow-Worm |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
Glow-Worm 20018487 O-Ring
The 20018487 O-Ring is manufactured to original equipment specifications, ensuring correct dimensions, material composition, and compatibility with the boiler’s system pressures and temperatures. Although deceptively simple, this small component plays an essential role in maintaining the boiler’s overall reliability and durability: even minor seal failures can lead to water leaks, pressure loss, component corrosion, or the activation of safety shutdown features designed to protect the system. A robust OEM O-ring crafted to the right tolerances helps avoid these issues and contributes to long-term boiler stability.
Over time, O-rings can degrade due to repeated thermal cycling, pressure fluctuations, and exposure to treated water chemicals, causing them to harden, crack, or lose elasticity. These wear patterns can be gradual and not immediately obvious, yet they can still allow slow leaks that reduce system efficiency and place additional strain on pumps, valves, and expansions vessels. Replacing a worn or damaged seal with this genuine Glow-Worm part restores a reliable, watertight connection, improves hydraulic integrity, and helps prolong the service life of the boiler’s internal circuits. Installation should always be performed by a qualified heating engineer to ensure correct placement, proper sealing, and full compliance with safety and performance standards.
Glow-Worm provide a 1 year warranty on all spare parts. Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 20018487 |
|---|---|
| Product Code | EDDGLOWWORM094 |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Glow-Worm |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
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