SMP – SandMaster Separators

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Types of LAKOS SandMaster Separators:

SMP Series Separators: Stainless steel outer body with plastic internal parts.

(Discontinued) H2O Series Separators: Carbon steel outer body with plastic internal parts.

Sandmaster NSF

View our NSF/ANSI-372 certified products here:

Sandmaster No Maintenance

No screens or filter elements to clean or replace. Centrifugal action removes sand without filter mess or restricted flow.

Sandmaster protection
Protect Your Home from Sand

Protect faucet screens, washing machine strainers, and ice-makers from clogging.

NSF Certification

NSF Certified, SandMaster Separators meet the needs of your residential water supply.

What can SandMasters Remove?

When you’ve got sand in your water, all it takes is a clear jar and three minutes to decide if a LAKOS Sand Separator can solve that problem.

Learn more: Three Minute Sand Settling Test
How to Determine Your Flow Rate

Model selection depends on actual flow rate of the pump. Do not use pipe size for model selection.

To determine your flow rate:

  1. Drain water from your system until the pump starts. With no other water in use, wait for the pump to completely re-fill the system and shut-off
  2. Open a valve downstream of the pressure tank and use a 5-gallon bucket to measure the volume of water drained until the pump turns on again
  3. Count the time it takes for the pump to again completely re-fill the system
  4. Divide your actual gallons of water by the time it takes to re-fill the system: gpm  = gallons per minute
  5. Example: 14 gallons drained from the system takes 1-3/4 minutes to re-fill system: 14/1.75 = 8 GPM
SandMaster Bucket Test



Models Downloads Flow Range Inlet/ Outlet*
Male, NPT
Ship Weight
US GPM m3/hr lbs. kg
SMP-05 Consult
5-10 1.1-2.3 1/2″ 9 4
SMP-10 PDF 10-20 2.3-4.5 3/4″ 10 5
SMP-20 PDF 20-32 4.5-7.3 1″ 17 8
SMP-30 PDF 30-48 6.8-10.9 1-1/4″ 17 8
SMP-45 Consult
45-70 10.2-15.9 1-1/2″ 17 8

* Units should be sized by system flow rate not pipe size.
Note: Purge pipe size for all models is 3/4″.

SandMaster Lit



Size: 3.67 MB

SandMaster Manual

Frequently Asked Questions

Answer: Flow rate is the most important factor in determining SandMaster Separator size because all LAKOS Separators operate within a prescribed flow range. Pipe size is not a factor in model selection so do not use your existing pipe size to determine the separator size.

Required separator size is often, but not always, smaller than the existing piping, and appropriate hardware is used to match the inlet/outlet size with existing piping.

Answer: To determine the necessary purge frequency, purge often at first and calculate the proper rate based on the expected volume of separated solids. Purge duration should be long enough to evacuate the purge chamber AND clear the entire length of the purge piping of all solids. This is usually indicated by a change in the color of the purged liquid from dark to light.

The time between purges should never exceed the time it takes to fill 1/3 of the collection chamber volume, based on the expected solids load and the separator’s purge collection volume, as indicated in the separator’s literature. Refer to LS-608 for additional information on calculating purge frequency and duration.

Answer: While there are many LAKOS Separators still in service after 15-25 years, there are many variables to the longevity of a LAKOS Separator. It can generally be expected to last as long as any other materials of similar construction in that system.

Environment, fluid chemical make-up, flow, the material of construction, type of solids, and maintenance purging are all important factors to the life of a separator. It is important to consider all these factors when purchasing a separator. Providing LAKOS with details about your application will ensure your separator meets or exceeds the life expected through your purchase. Consult your LAKOS factory representative to obtain the life expectancy in your specific application.

Answer: Solids-removal efficiency is affected by several factors, including the difference in specific gravity between the solids and the carrying liquid, the viscosity of the liquid, the particle shape, and any purging enhancement techniques. In general, with a specific gravity ratio of 2.6 (e.g. quartz sand in freshwater), liquids of 31 SSU viscosity, and generally round particles, a single pass through a separator removes up to 98% of particles 74 microns (0.0029 inches) and larger. Appreciable quantities of particles finer than 74 microns are also removed, as well as particles of lighter specific gravity. Higher specific gravities (like mill scale in water, where SG=5.7) result in much finer levels of filtration.

Contact LAKOS for assistance determining performance expectations on your specific application.

Answer: The maximum solids loading on LAKOS Separators is recommended to be less than 1% by volume. While 1% may seem low, keep in mind that 1% in a small 100 GPM system is 1 gallon of solids every minute, or 1,440 gallons (twenty-six 55-gallon drums) of solids per day.

SMP Separators for residential use are not recommended to exceed 0.25% by volume. If your application exceeds these limitations, please consult your factory representative for proven alternatives.