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SandMaster and SandMaster PLUS Sand Separators

SandMaster Water Filters are made by Lakos in the USA

The use of a sand filter (separator) may save you money over time by possibly extending the life of your regular water filters and water heater. They may also prevent sand from depositing in your plumbing lines. Lakos is a leader in the sand filtration industry and PlumbingSupply.com® is your source for Lakos products.

Lakos SandMaster Plus
Protects your residential water system
  • Ice-makers
  • Sprinklers
  • Water heaters
  • Washing machines
  • Faucets
  • Water conditioning
  • Undersink RO's
  • Water well pumps
Saves time and money
  • No screens or filter elements to clean or replace
  • No messy maintenance
  • Effective sand/silt removal
  • Ideal for corrosive water applications
  • Long-lasting stainless steel construction
  • Centrifugal separation technology


How Sand Filters (Separators) Work

Sandy Water In: Water, sand, silt and grit flow from the pump into the sandmaster.
Centrifugal Action Separation: Particles are thrown to perimeter, flall and collect in the lower chamber.
Clean Water Out: Free of sand, silt and grit water exits the separator and flows to the pressure tank.
Sand Purge: Open the valve periodically to flush away separated particles.
Great sand filters

Install between the pump and the pressure tank without concern about pressure loss or clogs.
View a typical SandMaster installation.

After the sand filters, we recommend installing a smaller particle filter.
Through 1" we recommend the #W10PR housing with either the #W30PEHD or #W50PEHD filter cartridges.
Through 1 1/2" the #W15PR housing with dual #W30PEHD or #W50PEHD sediment cartridges are recommended.

The SandMaster can not eliminate red colored clay/soil/mud - it will take out sand (which is heavier), but the red color may indicate another water quality concern.


SandMaster - CARBON STEEL Sand Separators (H20)

SandMaster sand separatorsCarbon Steel (model H20)

Select correct model by flow rate (gpm) not pipe size. Allow 12" of space below unit when installed.

Description Dimensions Pipe Size Drain Outlet Price & Quantity
Operates best at 5-10gpm 19-3/8" high x 4 1/2" diameter 1/2" 3/4" $272.23
         ★ Most Popular Model ★
Operates best at 10-20gpm
19-3/8" high x 4 1/2" diameter 3/4" 3/4" $301.76
    ★ 2nd Most Popular Model ★
Operates best at 20-32gpm
24-3/4" high x 6" diameter 1" 3/4" $333.27
Operates best at 30-48gpm 24-3/4" high x 6" diameter 1-1/4" 3/4" $353.36
Operates best at 45-70gpm 24-3/4" high x 6" diameter 1-1/2" 3/4" $391.81

The units do NOT come with purge valves. You may purchase purge valves separately below.

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SandMaster Plus - STAINLESS STEEL Sand Separators (SMP)

SandMaster sand separators304 Stainless Steel (model SMP)

Select correct model by flow rate (gpm) not pipe size. Allow 12" of space below unit when installed.

Description Dimensions Pipe Size Drain Outlet Price & Quantity
Operates best at 5-10gpm 20-3/4" high x 4-1/2" diameter 1/2" 3/4" $399.56
Operates best at 10-20gpm 20-3/4" high x 4-1/2" diameter 3/4" 3/4" $460.21
Operates best at 20-32gpm 26" high x 6" diameter 1" 3/4" $466.59
Operates best at 30-48gpm 26" high x 6" diameter 1-1/4" 3/4" $531.37
Operates best at 45-70gpm 26" high x 6" diameter 1-1/2" 3/4" $554.54

The units do NOT come with purge valves. You may purchase purge valves separately below.

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SandMaster & SandMaster Plus Accessories

Automatic Purge Systems

For use with SMP and H2O sand separators

sandmaster automatic purge valve and controlRPV-75-PDV

The RPV-75-PDV features:
  • Low cost solution for periodic purging
  • Glass reinforced plastic valve body with diaphragm flapper valve
  • Straight-through flow path
  • Battery operated
  • Requires two 9-volt alkaline batteries (not included with system)
  • Simple programmable control
  • Manual override
  • Only 2 settings required to program: purge frequency and purge duration
  • Purge duration can be set for 20, 30, 60 or 120 seconds maximum
  • Purge frequency can be set for 6, 12, 24 or 48 hours
  • Purge indicator light active during purge cycle
  • Maximum working pressure: 100 psi
  • 3/4" fips threads
  • Install controller within 20 feet of valve
  • Shaded installation recommended, avoid direct sprinkler spray and submergence in water
  • View typical installation diagram
The AP-75-MBV features:
  • Easy-to-program automatic valve
  • Nickel-plated brass body with stainless steel ball
  • 110v or 220v operation (same unit)
  • Valve may be installed in any position at the purge connection
  • LED display for programming and "valve open" indicator
  • Purge duration can be set at 20 seconds (recommended minimum) or as long as 5 minutes (Note: longer purge duration is only needed when the purge line is greater than 2-3 feet from the valve to open discharge)
  • Purge frequency can be set for every 4 minutes or up to every 24 hours
  • Manual override
  • Maximum working pressure: 150 psi
  • Battery-powered backup provides "fail-safe" closure of the valve if power should be interrupted while the valve is open
  • Requires four AA batteries (not included)
  • Shaded installation recommended, avoid direct sprinkler spray and submergence in water
  • 3-prong grounded plug for easy installation
  • View typical installation diagram


Part # Description Price & Quantity
RPV-75-PDV Auto purge for SandMaster $256.14
AP-75-MBV AccuPurge Automatic Purge System $504.79

The manufacturer recommends a manual ball valve (not included) be used for isolation of the automatic purge valves if needed. We recommend the 3/4" Kitz brand ball valve = $9.94


These easy-to-program automatic valves eliminate routine maintenance and assure proper periodic purging of sand and grit. Purge Frequency and Purge Duration will be determined by the user according to the amount of sand in the water. Heavier sand loads will require more frequent purging. The amount of water loss when purging will depend on the water flow, water pressure and purge duration (as set on the controller). A 20 second purge duration will typically flush approximately 5-10 gallons of water and sand.


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to high-flow Jumbo filter housings and cartridges


Manual Purge Valves

Kitz ball valve

Part # Description Price & Quantity
Kitz brand ball valve Manual Purge Valve (3/4") - screws directly onto the sand purge at the bottom of Lakos sand filters $9.94
VP-07-HKV Visual Purge Kit (3/4") - manual (includes ball valve) $57.12

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Wall Mounting Kits for Sandmaster Separators

sandmaster mounting bracket

Model Description Price & Quantity
#MBCK-0510 Wall Mount Kit (for 1/2" and 3/4" Models) $56.24
#MBCK-2045 Wall Mount Kit (for 1" to 1 1/2" models) $61.52

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Frequently Asked Questions

Q. "How do I select the appropriate SandMaster model for my water system?"
A. Each SandMaster model operates best within a specific flow range. You must determine your pump's actual flow rate.

If you have a valve between the pump and the pressure tank, open it fully and record the volume of water in one minute to determine gallons or liters per minute.

If you have no valve, follow these steps:

  1. Immediately after your pump shuts off, open the faucet between the pressure tank and house (make sure no water is running), run water in to a container and record the Volume (gallons or liters) of water it takes for the pump to start again. (You may have to fill several containers.)
  2. Record the length of Time it takes (in minutes) the pump runs before shutting off.
  3. Divide Volume by Time to determine the actual flow rate (gpm or liter/minute).

Q. "Why would I need to use the SandMaster Plus (304 stainless steel version) instead of the regular SandMaster?"
A. The SandMaster Plus is recommended for use in areas where corrosive water is a problem.

Q. "Why would I need to use a Lakos SandMaster sand separator instead of a typical water filter?"
A. Lakos SandMaster separators use centrifugal action to remove debris heavier than water. Typical water filters can get clogged by sand, silt and grit. Using a circular motion, particles are thrown to the perimeter, fall and collect in chamber at the bottom of the unit. You may want to use a 3/4" ball valve at the bottom to flush away (purge) the separated particles without having to replace any screens or cartridges.


Please note: While we strive to ensure every product we label as "Made in the USA" really is 100% made in the USA, it is also important to understand that sometimes manufacturers make changes to their products, or for various reasons may receive components or materials that they would normally purchase domestically from an overseas supplier - and they don't necessarily let distributors (like us!) know that they've changed something about the product or where it is manufactured.

If you receive a product that PlumbingSupply.com® says is "Made in the USA" and the product states it was manufactured elsewhere, please contact us. We will happily replace or refund your purchase to your satisfaction.


Prop 65 warning
California Proposition 65 Warning
WARNING: Some of the products listed on this page may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, click here.
(California law requires this warning to be given to customers in the State of California.)

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