On a wet saw, the water pump is not an accessory - it is what keeps the blade alive. This is the MK Diamond 115 volt submersible water pump, part 151271-MK, that feeds coolant water to the blade on MK-101, 1080 and 2000 series saws.
What a failing pump costs you
A diamond blade cuts by keeping its matrix cool and flushed. Starve it of water and three things happen fast: the blade glazes and stops cutting, the tile chips at the exit edge, and the segment bond overheats. Tile setters generally discover the pump has died only after the first bad cut of the day, which is why a spare pump is standard kit in most tile trucks. The saw itself keeps running perfectly - it is only the water that stopped.
Use cases
- Pump has stopped priming - saw runs, blade turns, no water reaches the shroud.
- Weak flow - impeller worn or partly clogged with slurry, so the blade gets a trickle instead of a stream.
- Replacing a non-OEM pump - a pump sized for a pond or fountain does not deliver reliable head at the blade shroud.
- Spare for the truck or the rental fleet - a dead pump stops the job, not just the saw.
- Jobsite electrical compliance - the UL/CSA listing matters where equipment gets checked before it goes on site.
Fit
MK Diamond specifies this pump for the MK-101, 1080 and 2000 series saws. Parts retailers extend the list across a number of related models, including block and brick saws in the same families. Note that MK uses more than one pump across its lineup - the MK-5000 series pump is a different part - so match the number on the pump you are removing rather than ordering by saw family alone.
Getting a long life out of it
Experienced tile setters are unanimous about what kills these pumps: slurry. The abrasive fines suspended in recycled cutting water grind the impeller and bearings. The common practice is to run the pump in a separate bucket of clean water rather than sitting in the saw's slurry tray, topping it up as needed, and to flush the pump in clean water before it goes back in the case. Users who do this routinely report pump lifespans measured in years rather than jobs. If the pump will not spin on a cold morning, the usual first move is to free the impeller through the intake grate gently - the vanes are plastic and will break if forced.
Specifications
- MK Diamond part number 151271-MK
- 115 volt, 60 Hz
- Submersible design
- UL and CSA listed
- Specified by MK Diamond for MK-101, 1080 and 2000 series saws
- Pump only - hose and fittings not included unless noted on your saw
Frequently asked questions
Does it fit my MK-101?
Yes. MK Diamond specifies this pump for the MK-101 along with the 1080 and 2000 series saws. Confirm against the number on the pump you are replacing if your saw has been modified or previously repaired.
Is this the OEM MK Diamond pump?
Yes, this is the MK Diamond part, 151271-MK. Note that MK uses a different pump on the MK-5000 series, so check your part number before ordering.
Why did my last pump fail so quickly?
Almost always slurry. Abrasive fines in recycled cutting water wear the impeller and bearings. Running the pump in a bucket of clean water instead of the slurry tray, and flushing it after use, dramatically extends its life.
Can I use a garden or pond pump instead?
It will often move water, but not reliably at the head the blade shroud needs, and it will not carry the UL/CSA listing that jobsite electrical checks look for.
Does the hose come with it?
This listing is for the pump. Hose and fittings depend on your saw configuration - check what is on the pump you are removing.
Discount Cleaning Products supplies replacement pumps, blades and wear parts for tile, stone and masonry equipment alongside its cleaning equipment lines, with US-based customer support.
