What do basements, yards, and construction sites have in common?
They can all flood.
With the help of a dewatering pump, however, you can restore all these places to a dry state. When shopping for a dewatering pump there 3 things you'll need to consider:
Dewatering pumps have an inlet size ranging in size from 1" - 4". No matter the size, they all work the same way. It sucks in water through an inlet valve and ejects it from a discharge valve. A 4" dewatering pump will finish a job 4 times faster than a 1" pump.
If you need to empty a pool, any size pump will get the job done. The difference in size just means the bigger pumps can get the job done more quickly.
All gas-powered engines need lubrication to run properly. This is done with engine oil, which also prevents the engine from overheating. If you run an engine without oil you can ruin it.
A dewatering pump with a low-oil shutoff feature will automatically stop the engine from running when it senses a drop in oil pressure, preventing immediate damage.
Depending on where you'll be using a dewatering pump, you may want to consider a protective roll cage for the pump. A roll-cage helps to protect the pump in case it falls or something drops on it.
Another feature to look for is anti-vibration dampening. These are essentially just rubber mounts between the pump and the protective cage, keeping it in place and so it doesn't rattle and make more noise than necessary while in use.