Sumps and Pumps in lift pits

A sump and pump installed in a lift pit can often seem a easy or straight forward application?

You would think so, but, no its not. Careful consideration must be at design stage, assessments must be made to ascertain that in all probability the shaft will probably end up will lift oil at the base at some point. lift rams may leak, oil seals to the lifts mechanics may fail all leading to build up of oil.

There are exceptions however, fire fighting and fire evacuation lifts can have a sump pump installed to draw water away in case of an emergency.

The most important factor of the pits design is waterproofing. Groundwater can often fill the shaft without the correct waterproofing design. So, you can see that its not just about installing a pump.

Oils are prohibited by Law to be pumped into our sewer system, Ideally a sump tank must be designed external the the shaft to deal with the groundwater issue and an additional oil and water alarm installed within the shaft itself. The shaft can then be monitored in case of heavy oil from the lift mechanics and groundwater failure.

If a pump has to be installed within the shaft then this should be pumped to a oil seperation tank external to the shaft. The pump should be designed to accept the working pump head height.Incorrect design of head height can lead to early failure of the pump. Also careful consideration of the correct pump must be undertaken. most basic pumps will struggle to pump heavy oils, oil is much heavier than water so in principal the pump will struggle to operate long term.

London Basement Pumps offer a free design service of lift shaft applications.We work along side some of the market leaders in the waterproofing industry to combat groundwater problems. London Basement Pumps can supply service and repair all types of lift pumps,oil alarms and oil seperation tanks. Why not contact us on 0800 009 21 20 to speak to a member of our team.

London Basement Pumps

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