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Monitor Pitless and Booster Systems
Monitor Pitless & Booster Systems
Below-frost pitless units, municipal pitless booster stations, well caps, and pitless adapters — engineered by Baker in Evansville, Wisconsin since 1873.
Monitor, a division of Baker Manufacturing Company, LLC, developed the first pitless unit and has built well-head equipment in Evansville, Wisconsin since 1873. Watermain Supply distributes the full Monitor line: industrial and municipal pitless units, pitless booster stations, and a complete domestic and rural well-head line. Monitor water-passage products are made in the USA, NSF/ANSI 61 and 372 certified, conform to Water Systems Council PAS-97 (2017), and are available AIS/BABA compliant by request.
Industrial & Municipal Pitless Systems
The pitless unit forms a watertight extension of the well casing below the frost line, lets the submersible pump be removed without disturbing external piping, and discharges below grade to prevent surface contamination — eliminating the well house and well pit.
Product families
| Product family | Size range | Typical application |
|---|---|---|
| Standard Industrial Pitless Units | 6 to 16 in well | Municipal and industrial groundwater wells; flowing wells |
| Custom Industrial Pitless Units | 10 to 36 in well | Large-diameter and high-capacity production wells |
| Pitless Booster Stations | 5 to 36 in tank | Pressure boosting — potable, non-potable, irrigation, snow-making |
| Weld-On Pitless Adapters | 8, 10, 12 in well | Quick, watertight steel-casing well-head connections |
| Protective Well Enclosures | 24 to 42 in dia | Above-grade well-head security, venting, and freeze protection |
Construction and certification
Water passages are hot-dipped lead-free galvanized or corrosion-resistant material, sealed with neoprene O-rings between precisely machined surfaces. Cast iron caps and screened vents, steel pitless cases, and ductile or cast iron discharge bodies are standard; stainless steel is available on request. Units are rated to 300 psi discharge as standard, with higher pressures accommodated using backup rings. Booster stations add a 150 psi inlet rating. In-line check valves are Flomatic, rated to 400 psi and VFD-compatible. Every unit is NSF/ANSI 61 and 372 certified, conforms to the Ten States Standards and Water Systems Council PAS-97, is made in the USA, and is available AIS/BABA compliant by request.
Engineering-led sizing
We size pitless units and booster stations to your well casing, drop pipe, discharge configuration, lift-out load, and pump duty — designed lift-out capacities range from roughly 4,700 lb on a 5 in booster to over 200,000 lb on the largest custom units. Send us the well details and pump curve and we will spec the correct ordering configuration.
1873Baker founded in Evansville, WI
300 psiStandard discharge rating
NSF 61 & 372Certified water-passage products
USAMade in the USA; AIS/BABA on request
Pitless Booster Stations
An economical way to fill water storage tanks or pressurize a distribution system. The submersible pump and motor sit below ground inside the pitless case while Monitor Municipal Controls run above grade — no vault, no pump house, and no confined-space entry. Built for municipal and commercial systems, large or small, and NSF certified.
Simplex Booster System
A single submersible booster pump in the pitless case — constant-pressure tank fill or line boosting for smaller systems, VFD-controlled to hold pressure across demand.
Request availabilityDuplex Booster System
Two pumps for alternation, redundancy, and higher combined flow, staged by Monitor Municipal Controls to maintain a constant pressure setting as demand swings.
Request availabilityTriplex Booster System
Three pumps for high-demand municipal duty — staged lead-lag-lag operation with full redundancy and efficient power use under low or high flow.
Request availabilityStation construction
- Quiet — submersible pump and motor are housed below ground
- Safe — no vault and no confined-space entry
- Economical — eliminates the pump house or vault
- Durable — choose ductile iron, steel, or stainless steel construction
- Corrosion-protected — wettable surfaces are lead-free galvanized for long-term protection
- Easy access — quick submersible pump service from grade
- Expandable — larger pumps can be inserted to handle future demand
Monitor Municipal Controls
- Variable-frequency drive — virtually eliminates water hammer and the need for pump control valves
- Constant pressure — maintains the desired setting over a wide range of flow
- Emergency pump shutdown — in case of a discharge-line break
- Low suction-pressure protection
- SCADA system compatible
- Versatile — tank-fill boosters convert to maintain line pressure during tank maintenance
- Overload protection — UL listed, single- or three-phase power, unlimited starts per hour
Engineering-led sizing
We size the booster to your suction pressure, target discharge pressure, flow, and pump curve, and select a simplex, duplex, or triplex arrangement with the right control package. For above-grade and retrofit sites, Monitor also offers a factory-assembled skid-mounted packaged booster — confirm the configuration on the factory submittal. Send the duty point and we will return the ordering configuration.
NSFCertified booster systems
VFDConstant-pressure control
ULListed; single & 3-phase
SCADASystem compatible
Domestic & Rural Well Products
Beyond municipal and industrial systems, Monitor builds a complete domestic well line — sanitary well caps, pitless adapters, pitless units, tank tees, and at-the-well controls — for residential, agricultural, and rural groundwater supply.
Well Caps & Vents
Watertight, ventilated, and locking well caps in cast iron, ABS, and aluminum for 4 to 14 in casings — plus jet-pump caps, screened air vents, cap cable seals, and the Snorkel flood vent. Lead-free NSF/ANSI 372, PAS-97 (2017) conforming.
Request availabilityPitless Adapters
Snappy galvanized, Bulldog and brass slide-type lead-free red brass, stainless slide-type, and E-Z weld-on and clamp-on adapters for 4 to 8 in I.D. wells with 1 to 2 in drop and discharge — sanitary, below-frost service connections rated to 250 psi.
Request a quoteDomestic Pitless Units
PS submersible pitless units in threaded and Kwikonect styles for 4, 5, and 6 in wells, plus Illinois-code pressurized, flowing-well, and DQ field-cut kit configurations — and PJ jet-pump units for 2 in driven wells.
Request a quoteTank Tees
Break-a-way and pump-control tank tees in lead-free red brass with type-L copper tube — gauge, switch, drain, and relief ports in 1 and 1¼ in sizes. A pressure-tank connection point without a separate tee.
Request availabilityAt-the-Well Controls & Switches
Plug-in and screw-in at-the-well control kits that locate the pressure switch and motor control box inside the well casing, with all-weather pressure switches — for 0 to 8 ft bury depths, rated to 120 psi.
Request availabilityWell-Head Accessories
Welding and swagged nipples, pitless connectors, pipe holders, and 6,000 lb pipe elevators to complete the well-head connection and support safe drop-pipe handling during pump set and pull.
Request availabilityHand Pumps & Yard Hydrants
Rural, off-grid, and standby water: lift, force, and drinking-fountain hand pumps with brass cylinders, flanges, and pump rod, the hand-pump diverter, and Magnum frost-proof yard hydrants in cast iron and stainless for ranch and farm duty.
Request availabilityProduct families
| Product family | Size / range | Typical application |
|---|---|---|
| Well caps & vents | 4 to 14 in casing | Sanitary, vermin-resistant well-head sealing and venting |
| Pitless adapters | 4 to 8 in I.D. wells; 1 to 2 in pipe | Below-frost sanitary service connections, to 250 psi |
| PS domestic pitless units | 4, 5, 6 in wells | Submersible well-head; threaded or Kwikonect, lift-out service |
| PJ jet-pump pitless units | 2 in driven wells | Shallow-well and single-pipe deep-well jet systems |
| Break-a-way & pump-control tank tees | 1 and 1¼ in | Pressure-tank connection; gauge, switch, and relief porting |
| At-the-well controls & switches | 0 to 8 ft bury | Pressure switch and control box inside the well casing |
| Well-head accessories | 2 to 12 in | Nipples, connectors, pipe holders, and pipe elevators |
| Hand pumps & yard hydrants | 4 to 6 in wells; 1 to 11 ft bury | Rural, agricultural, off-grid, and standby water |
Construction and certification
Domestic water passages are lead-free galvanized cast iron, lead-free red brass, or 304 stainless steel, sealed with neoprene O-rings, and conform to NSF/ANSI 372 and Water Systems Council PAS-97 (2017). Snappy and Bulldog adapters carry a 1,000 lb hold rated at 250 psi; slide-type adapters reach 6,000 lb safe load. Most products are made in the USA; the small number of imported caps are identified on the factory submittal.
4–14 inWell cap casing range
6,000 lbSlide-type adapter safe load
NSF 372Lead-free certified
PAS-97Water Systems Council conforming
Literature & Submittals
Current Monitor catalogs, brochures, and certifications. Final unit configuration, materials, and ratings should be confirmed against the factory submittal for your specific well and pump.
Industrial & Municipal Products Catalog
Full industrial and municipal pitless unit, booster station, weld-on adapter, and protective enclosure line.
Download PDFBooster Stations Brochure
Simplex, duplex, and triplex pitless booster systems with Monitor Municipal Controls.
Download PDFSkid-Mounted Packaged Booster
Factory-assembled skid-mounted packaged booster for above-grade and retrofit installations.
Download PDFBooster Stations NSF Certification
NSF/ANSI certification documentation for Monitor booster systems.
Download PDFDomestic Products Catalog
Well caps, pitless adapters, domestic pitless units, tank tees, controls, and accessories.
Download PDFWhy source Monitor through Watermain Supply
Authorized distribution
Direct factory line on the full Monitor range — correct parts, correct configurations, factory submittals.
Engineering-led sizing
Units sized to your well, pump, discharge, and duty point instead of a guess off a catalog page.
American-made and certified
Made in the USA, NSF/ANSI 61 and 372 certified, PAS-97 conforming, AIS/BABA on request.
Well to boost, one source
Pitless units, municipal booster stations, and the complete domestic well-head line under one umbrella.
Spec a Monitor system for your project
Send the well casing, drop pipe, discharge type, duty point, and pump curve — we will return the correct ordering configuration.
281.664.8000Watermain Supply is an authorized distributor of Monitor products, a division of Baker Manufacturing Company, LLC (Evansville, WI). Specifications are drawn from current Monitor and Baker literature and are subject to change without notice. Final unit configuration, materials, and ratings should be confirmed against the factory submittal for your specific well and pump before ordering.
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