Do I need a Flue with my Water Heater? December 06, 2019 14:38 Updated Follow If you are using any of the following Water Heaters: Morco Primo 6 Litre LPG Gas Water Heater Cointra 10 Litres Per Minute Gas Water Heater then you need a Morco Primo Gas Water Heater Flue Kit For the Cointra 10 Litres Per Minute Gas Water Heater you would need a Morco EUP11 Gas Water Heater Flue Kit. Related articles Which water heater to use somewhere with no mains? Can I replace a Morco D61B with a Cointra water heater? Rinnai Continuous Flow, Condensing & Non-Condensing Water Heaters Cabinet Gas Heaters Comparison Are your Rinnai boilers combi boilers? Comments 0 comments Please sign in to leave a comment.