Universal 900mm Gas Thermocouple Kit – BES 6336

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Reliable universal gas thermocouple for boilers, fires and ovens

The BES 6336 Universal 900mm Gas Thermocouple Kit is designed as a straightforward, like-for-like replacement for standard thermocouples on many popular gas appliances. The 900mm length provides plenty of reach for neat routing inside the appliance, while the universal design and adaptor fittings make it suitable for a wide range of gas valves and pilot assemblies.

This kit is commonly used by gas engineers and maintenance teams to restore flame failure protection on natural gas appliances in domestic, commercial and light catering environments.

Key Features & Benefits

  • Universal replacement thermocouple – fits a wide variety of gas appliances when used with the supplied fittings and adaptors.
  • 900mm length – long, flexible capillary for easy positioning and routing within the appliance case.
  • Flame failure protection – shuts off the gas supply if the pilot flame goes out, helping to keep the appliance safe.
  • Supplied as a complete kit – includes thermocouple, button end connectors, spring clip and pilot burner fittings so you have everything needed for a standard replacement.
  • Compatible with many popular brands – suitable as a replacement for models from manufacturers such as Monitrol, ITT Maclaren, Perl/Black, Robertshaw, Sperryn M, Honeywell and S.I.T. (check appliance details before fitting).
  • Ideal for service engineers – a handy universal kit to keep in the van for quick repairs and call-outs.

Typical Applications

  • Gas boilers
  • Gas fires & wall heaters
  • Gas ovens and cookers
  • Water heaters and catering appliances (where a compatible universal thermocouple is specified)
  • Always ensure installation is carried out by a qualified Gas Safe registered engineer and that compatibility is checked against the appliance manufacturer’s recommendations.

Technical Specification

  • Product code: BES 6336
  • Type: Universal gas thermocouple kit
  • Length: 900mm
  • Fuel: Suitable for natural gas systems (and other compatible systems where a standard universal thermocouple is specified)
  • Kit contents (typical): 1 x 900mm thermocouple

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Specifications

The BES 6336 Universal 900mm Gas Thermocouple Kit is a reliable replacement flame-sensing device for a wide range of gas appliances. With a 900mm lead and universal fittings, it’s ideal for gas boilers, fires, ovens and water heaters, helping to maintain safe, efficient operation of the appliance.

Delivery

Royal Mail’s Tracked 24® Cut of time 3 PM

📦 Delivery Aim

Royal Mail’s Tracked 24® is their premium next-day tracked parcel delivery service within the UK. Next working day delivery after posting (including Saturdays). It’s an aim, not a guarantee — most parcels arrive next day, but not 100%.

⏰ Delivery Times

Monday to Saturday, usually by 4:30 pm for most addresses.
Rural / remote areas may receive deliveries later in the day.

📍 Postcode Coverage

Tracked 24 is available for almost all UK postcodes.

Some remote locations (e.g. Scottish Highlands, islands, Isle of Man, Channel Islands, BFPOs) may take longer than next-day.

Returns

Cateringbase Ltd – 30-Day Returns Policy

At Cateringbase Ltd, we want you to be happy with your purchase. If you need to return an item, please review the policy below.

1) Returns Window

You may return most items within 30 days of the delivery date.

2) Return Eligibility

To qualify for a return, the item must be:

  • Unused and in resaleable condition
  • In the original packaging, including all protective inserts, labels, manuals, and accessories
  • Free from damage, markings, scratches, stains, or signs of use

We may refuse returns that do not meet these requirements.

3) Non-Returnable Items

For hygiene and safety reasons, the following items may not be returned unless faulty:

  • Items that have been installed, used, or modified
  • Customised or made-to-order products
  • Clearance or final-sale items (where clearly marked)
  • Items that cannot be resold due to hygiene or food-contact handling once opened (where applicable)
4) How to Request a Return

To start a return, please contact us within 30 days and provide:

  • Your order number
  • The item(s) you want to return
  • The reason for return (optional but helpful)
  • Photos (required if the item is faulty or damaged)

We will confirm your return approval and provide instructions for returning the item.

5) Return Shipping Costs
  • If you are returning an item because you changed your mind, you are responsible for the return shipping cost.
  • If the item is faulty, damaged in transit, or incorrect, Cateringbase Ltd will cover return shipping (or offer a suitable alternative solution).

We recommend using a tracked delivery service, as we cannot be responsible for returns lost in transit.

6) Refunds

Once the returned item is received and inspected, we will process your refund to the original payment method.

Refunds are typically issued within 5–10 business days after inspection, depending on your bank or payment provider.

Please note:
Original delivery charges are non-refundable unless the item is faulty or incorrect.

7) Exchanges

If you would like an exchange, we can arrange this subject to stock availability. If the replacement item has a different price, we will confirm any balance due or refund owed.

8) Damaged or Incorrect Items

If your item arrives damaged or you receive the wrong item, please contact us within 48 hours of delivery and include clear photos of:

  • The item
  • The packaging
  • Any visible damage

We will resolve the issue as quickly as possible.

9) Return Address

Return details will be provided once your return is approved.
Please do not send items back without contacting us first.

Frequently Asked Questions

Will this thermocouple fit my boiler or gas fire?

The BES 6336 is a universal 900mm gas thermocouple kit designed to fit many popular appliances and gas valves using the supplied adaptor nuts and fittings. Always check your appliance manual or consult a Gas Safe registered engineer to confirm compatibility before purchase and installation.

Can I install this thermocouple myself?

No. All gas work, including replacing thermocouples, must be carried out by a suitably qualified and registered gas engineer in accordance with local regulations.

What does a thermocouple do on a gas appliance?

The thermocouple monitors the pilot flame. If the flame goes out, the thermocouple cools and signals the gas valve to shut off the gas supply, providing essential flame failure protection.

What does the BES 6336 thermocouple do?

A thermocouple is a safety device that senses the pilot flame on a gas appliance. If the flame goes out, the thermocouple cools down and signals the gas valve to shut off the gas supply, providing flame failure protection.

Is this thermocouple really “universal”?

The BES 6336 is a universal 900mm thermocouple kit supplied with a range of adaptor nuts and fittings. This allows it to fit many popular boilers, gas fires, ovens and heaters. However, no product fits every appliance, so compatibility should always be checked before installation.