Non-Return Roof Sump Valve

Non-Return Roof Sump Valve

Maxwell Non-Return Roof Sump Valve

Our Maxwell Non-Return Sump Valve is a float valve that is designed as a ball valve safety mechanism. A safety mechanism means that it will function at all times to prevent accidents.

From the safety point of view any floating roof sump valve, so also the Maxwell Non-Return Sump Valves needs regular inspections and through this cleaning or replacement during these routine inspections.


Standard our Non-Return Sump Valve it superior sealing capacity is generated by a metallic ball, upon request we can equip the same valve with a non-metallic ball.


Maxwell sump valves can become custom calculated to meet each individual tank within the requirements of both regulations and customer wishes.


Maxwell Continental Tank Serv Engineering has combined over 20 years’ experiences from the past with their research and development, through which it has produced increasingly innovative products for above ground storage tank (AST).

And it’s not just about the new and interesting, when old technologies and products are to be revitalised or re-used it always can be reviewed and when needed altered to be made more efficient.


The most commonly used Maxwell Roof Sump Drain Valve is:

• Non-Return Roof Sump Valve