Coolant leak

[Scotclimb]

Hi.
Has anyone experienced this problem or know how I can fix it. I have to top up coolant once a month roughly. When I done a recent service I noticed the leak is coming from the wabesto heater. Passenger side just below/behind passenger seat. I can’t see exactly where the leak is coming from. But it looks like maybe a pump or something. Are these units easily dropped out for further investigation? Thanks

 

[Nik_campervan]

Found the pump on my heater leaking this evening. Need to confirm part # and replace. I expect its leaking from the joint in the pump housing.