When it comes to keeping basements, cellars, or plant rooms dry, choosing the right sump pump makes all the difference. The Tsurumi OMA5 sump pump is one of the most compact and reliable options available, designed to remove water efficiently from tight spaces while standing up to long term use.
Here’s how it works, what makes it special and where it performs best.
Compact Power for Everyday Drainage
The OMA5 combines stainless steel and thermoplastic construction, giving it both strength and corrosion resistance without adding unnecessary weight. This balance makes it perfect for domestic and light commercial applications, particularly in sump pits, basements, or utility areas.
Despite its compact design, it’s fitted with a 150-watt motor that delivers strong flow rates for its size. The pump handles typical drainage tasks like water seepage or minor flooding with ease, moving hundreds of litres per minute when conditions are right.
Smart Design for Maximum Reliability
One of the key strengths of the Tsurumi OMA5 Sump Pump is its ability to prevent air locking, a common issue that can cause pumps to stop working even when water is present. The pump features an integral vent valve that automatically releases trapped air, ensuring consistent operation.
The OMA5 also comes in two options:
- The OM5, a manual version suited for controlled operation.
- The OMA5, which includes a tubular float switch for automatic on/off functionality- ideal for smaller pits where a pendant float might snag.
This flexibility means users can select the version that best fits their setup and level of automation.
Built to Last
Durability is a core part of Tsurumi’s design philosophy and the OMA5 reflects that. It features a 316 stainless steel shaft, along with twin silicon carbide mechanical seals lubricated in an oil chamber to minimise wear. These details reduce maintenance requirements and extend the pump’s working life.
Each model is supplied with a 10metre heavy duty rubber cable, providing ample length for installation flexibility and all come backed by a 3 year warranty through Henry Pumps.
Where It Works Best
The Tsurumi OMA5 sump pump is ideal for:
- Domestic basements and cellars prone to minor flooding or dampness
- Utility rooms or boiler spaces where occasional water build up occurs
- Shallow sumps beneath equipment
- Light industrial environments needing clean water drainage
- Construction or service areas where space is limited
Its 10mm solids handling capability allows it to deal with slightly dirty or gritty water, though it’s best suited to relatively clean applications rather than heavy sludge.
Installation & Maintenance Tips
To get the best performance from a sump pump like the OMA5, a few good practices go a long way:
- Ensure the sump pit is deep enough for proper float switch movement.
- Keep the discharge line as straight and short as possible to avoid pressure loss.
- Use a strainer or screen to prevent debris from entering the impeller.
- Periodically test the pump by filling the pit and confirming automatic activation.
- Check seals and cabling occasionally, especially after heavy use.
With these basic steps, the OMA5 can deliver years of dependable service.
Frequently Asked Questions
Can the OMA5 sump pump handle dirty or sandy water?
Yes, it can handle light debris up to around 10mm in size, but isn’t intended for thick sludge or large solids.
What’s the difference between the OMA5 and OM5?
The OMA5 includes an automatic tubular float switch, the OM5 version operates manually.
How deep can the OMA5 pump from?
It provides up to roughly 7.5m of head, ideal for most basement and light drainage applications.
Does the OMA5 sump pump need much maintenance?
Very little. Regular checks of seals, float movement and keeping the inlet clear are generally all that’s needed.
Final Thoughts
Compact, efficient and easy to install, the Tsurumi OMA5 sump pump is one of the most dependable sump pumps for homeowners and professionals who need reliable water removal in confined spaces. Its intelligent design and build quality make it a pump you can fit and forget, with confidence it will perform when needed most.