Morco

Morco is a long-established UK supplier of LPG heating and hot water appliances, including the Primo and EUP gas water heaters found in…

Morco Products Ltd is a UK supplier of LPG heating and hot water appliances, with roots going back to a marine chandlery business founded over 200 years ago and over 70 years supplying its own branded LPG heating and hot water solutions1. For a household preparing for emergencies, that matters: an LPG appliance keeps working when the mains gas or electricity supply fails, as long as the gas bottle holds out.

The products this site mentions

The Primo Gas Water Heater and the EUP Gas Water Heater are open-flued LPG water heaters that may be installed in mobile homes, caravans and domestic settings2. They heat water instantly as it flows, so a household with one can wash and fill hot water bottles even during a power cut, when an electric immersion heater or a mains combination boiler cannot run. Around 23.9 million (82%) of UK homes have gas boilers for heating and hot water, and those boilers need an electricity supply to operate, so households that rely on them lose hot water in a power cut3. An LPG water heater on a bottle does not have that weakness.

Morco also makes the GB24 IV and GB30 IV, wall mounted, room sealed, condensing combination boilers with automatic spark ignition and fan assisted combustion, providing central heating and instantaneous domestic hot water4.

What to know in an emergency

A working LPG water heater can supply hot water during a power cut, but only if it is a model outside the recall above. Check the model and serial number against the recall notice before you rely on it, and do not use a recalled heater under any circumstances.

If you smell gas, Morco's own instructions are to contact the gas supplier without delay and turn off all gas supplies4. Any installation or repair must be carried out by a Gas Safe registered engineer: it is the law that Morco boilers are installed by a registered engineer in the UK, and every registered engineer carries an ID card with their own unique licence number and a photograph4.

Morco offers a 5 year parts and labour warranty from the first commissioning date on its GB24 IV and GB30 IV combination boilers from serial number AHN onwards, for appliances located in Great Britain or Northern Ireland, and activation by registration is required4. The maker's website, morcoproducts.co.uk, carries the latest literature for specification, maintenance and parts replacement, and includes a guide to finding your model and serial number so you can check the recall list4.

For the wider picture of keeping warm, cooking and lighting your home without mains power or gas, see our guides on heating and cooking without mains power, power cuts, gas and heating failures, home emergencies and backup power at home.

Sources (5)
  1. Morco Products Ltd open flued water heaters: important safety warning, CO Gas Safety, 2024-12-24
  2. Product safety report: Morco gas water heaters Primo (MP) / EUP, UK Government, 2025
  3. Written evidence on energy security, UK Parliament, 2022-01-13
  4. GB24 & GB30 IV LPG Installation & User Instructions, Morco Products Ltd, 2025-06
  5. Gas safety, Argyll and Bute Council, 2026

Common questions

How do I find the model number on my Morco water heater?

Morco's website includes a guide showing how to find the model number and serial number on your appliance, which you need to check whether it is on the recall list. You will also need these details, along with the purchase date, to register an appliance so the maker can contact you about safety notices. Check the data badge on the unit itself rather than paperwork you may have lost.

What should I do if my Morco heater smells of gas?

Morco's own instructions say to contact your gas supplier without delay and turn off all gas supplies. If you own a Primo or EUP open-flued water heater, do not attempt to check or test the appliance yourself: contact Morco immediately to discuss next steps. Gas leaks carry a risk of fire and explosion, so leave the area and get professional help.

My Morco boiler won't produce hot water. What can I check?

For the GB24 IV and GB30 IV combination boilers, the maker's manual lists fault codes: if the boiler fails to light after five attempts a fault code is displayed, and flame failure shows as F2 or L2. Any gas work beyond this must be carried out by a Gas Safe registered engineer, as it is the law in the UK that these boilers are installed and worked on by registered engineers.

Are Morco Primo and EUP water heaters affected by a recall?

Yes. Four models of open-flued water heaters, the Primo 6 (MP6), Primo 11 (MP11), EUP6 and EUP11, were recalled because of a risk of gas leaking which, if ignited, may cause fire, burns and injuries. Heaters sold between 2018 and 2023 are affected, and even heaters that received an earlier safety upgrade are included. Stop using them and disconnect the gas supply.

Do I need a Gas Safe engineer for my Morco appliance?

Yes. Morco's instructions state it is the law that their boilers must be installed by a Gas Safe registered engineer in the UK, and official guidance says only a registered engineer should carry out gas work. Every registered engineer carries an ID card with their own unique licence number and a photograph, so ask to see it before work begins.

Can I get spare parts for my Morco boiler?

Morco's manual states that only the manufacturer's parts are to be used for replacement. The maker's website, morcoproducts.co.uk, carries the latest literature on specification, maintenance practices and parts replacement. Any fitting of gas parts should be done by a Gas Safe registered engineer.

Should I drain my Morco water heater in winter?

Official winter guidance is to look after your pipes, insulate your water tank and help prevent burst or frozen pipes. If your caravan, mobile home or property with a Morco appliance will be unoccupied over winter, ask a Gas Safe registered engineer how to protect the appliance, and follow Scottish Water's advice on pipes if you are in Scotland.