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Mobile ViewBASEMENT CEILING VAPOR BARRIER BASEMENT HEAT LOSS BASEMENT WATERPROOFING BRICK WALL DRAINAGE WEEP HOLES BUCKLED FOUNDATIONS due to INSULATION? BUILDING NOISE DIAGNOSIS & CURE CRAWL SPACES CRAWL SPACE DRYOUT PROCEDURES CRAWL SPACE GROUND COVERS CRAWL SPACE INSULATION RETROFIT CRAWL SPACE SAFETY ADVICE CRAWL SPACE VAPOR BARRIER CRAWLSPACE MOLD ADVICE MOLD CLEANUP by MEDIA BLASTING MOLD ON DIRT FLOORS SUMP PUMPS CONDENSATION or SWEATING PIPES, TANKS CONDENSATION on WINDOWS & SKYLIGHTS DEW POINT CALCULATION for WALLS DEW POINT TABLE - CONDENSATION POINT GUIDE EFFLORESCENCE, Salts & White / Brown Deposits ENERGY SAVINGS in BUILDINGS ENVIRONMENTAL HAZARDS - INSPECT, TEST, REMEDY EXTERIORS of BUILDING FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP FIRST PRIORITIES BUILDING ENTRY PROCEDURE AFTER FLOODING CRAWL SPACE SAFETY ADVICE DRINKING WATER - EMERGENCY PURIFICATION DRINKING WATER - EMERGENCY SOURCES ELECTRICAL SAFETY for Flood Damage Inspectors FLOOD RESPONSE CHECKLIST FLOOD DAMAGE RFERENCES FLOOD VENTS & FLOOD PORTS FLOOD-CAUSED MOLD, PREVENTION FLOODED HEATING EQUIPMENT REPAIR FLOODED WATER HEATER REPAIR FLOODED SEPTIC SYSTEMS, REPAIR FOUNDATION CRACKS & DAMAGE GUIDE FOUNDATION DAMAGED, by FLOODING FRAMING DAMAGE, INSPECTION, REPAIR MOBILE HOMES, DOUBLEWIDES, TRAILERS Mold in Fiberglass Insulation Mold on Books, Book Conservation Mold on Fiberboard Insulating Sheathing MOLD PREVENTION AFTER FLOODING MOLD PRODUCTS, INEFFECTIVE MOLD RESISTANT CONSTRUCTION SEPTIC SYSTEMS & FLOODS SEPTIC BACKUP PREVENTION SEWAGE BACKUP, WHAT TO DO SEWAGE BACKUP TEST & CLEANUP SEWAGE BACKUP PREVENTION SEWAGE CONTAMINATION in BUILDINGS SEWAGE NITROGEN CONTAMINANTS SEWAGE PATHOGENS in SEPTIC SLUDGE SEWAGE PUMPS SEWER BACKUP PREVENTION SEWER GAS ODORS SEWAGE & SEPTIC CONTAMINANTS SEWAGE CONTAMINATION in BUILDINGS SEWAGE PATHOGENS in SEPTIC SLUDGE WHEN TO STOP LOOKING FOR MOLD Wind Damage to Roofs FLOOD DAMAGED FOUNDATIONS FLOOD VENTS & FLOOD PORTS FLOODS IN BUILDINGS-mold FLOOR, CERAMIC TILE FLOOR DAMAGE DIAGNOSIS FLOOR TYPES & DEFECTS FOOTING & FOUNDATION DRAINS FOOTINGS EXPOSED, Repair Methods FOUNDATION BULGE or LEAN MEASUREMENTS FOUNDATION CONSTRUCTION TYPES FOUNDATION CONTRACTORS, ENGINEERS FOUNDATION CRACKS & DAMAGE GUIDE FOUNDATION WATERPROOFING FRENCH DRAINS FREEZE-PROOF A BUILDING FROST HEAVES, FOUNDATION, SLAB HEAT LOSS in buildings HUMIDITY LEVEL TARGET ICE DAM PREVENTION Ice Dams: Comparing Two Houses INSULATION INSPECTION & IMPROVEMENT MOBILE HOME INSPECTIONS MOISTURE CONTROL in BUILDINGS MOLD in FOAM INSULATION, RESISTANCE MOLD INFORMATION CENTER NOISE / SOUND DIAGNOSIS & CURE ODORS & SMELLS DIAGNOSIS & CURE PLUMBING SYSTEM INSPECT DIAGNOSE REPAIR SEPTIC SYSTEM INSPECT DIAGNOSE REPAIR SEPTIC SYSTEM PUMPS Sewage Ejector Pump Grinder Pump What is a Sewage Ejector? Sewage Pump Clog Damage Free-Standing Sewage Grinder Pump Septic Pump Alarm Systems Septic Pump Buyers Guide Septic Pump Duplex System Designs Septic Pump Inspection & Maintenance Septic Pump Installation Guide Septic Pumping Stations SUMP PUMPS SEPTIC PUMPING REPAIR SEPTIC SYSTEM DEFINITIONS SEPTIC SYSTEM DESIGN ALTERNATIVES SEPTIC SYSTEM DESIGN BASICS SEPTIC SYSTEM TYPES, MASTER LIST SEPTIC TANK, HOW TO FIND SEPTIC TANK PUMPING SCHEDULE SEWAGE BACKUP, WHAT TO DO SEWAGE BACKUP TEST & CLEANUP SEWAGE BACKUP PREVENTION SEWAGE PUMPS SEWAGE PUMP CLOG DAMAGE SOUND CONTROL in BUILDINGS STAINS on BUILDINGS - QUICK GUIDE STAIN DIAGNOSIS on BUILDING EXTERIORS STAIN DIAGNOSIS on BUILDING INTERIORS STAIN DIAGNOSIS on ROOFS STAIN DIAGNOSIS on STONE STAINS on INDOOR SURFACES: PHOTO GUIDE STRUCTURAL INSPECTIONS & DEFECTS SUMP PUMPS SEPTIC SYSTEM PUMPS Sump Pump Discharge Sump Pump Inspection Sump Pump Types Submersible Sump Pump Guide Pedestal Type Sump Pump Guide Battery Backup Sump Pump Choices Water Powered Sump Pump Guide Sump Pump Single vs Duplex SWEATING (CONDENSATION) on PIPES, TANKS TERMITES, ROT TOILETS, INSPECT, INSTALL, REPAIR TOILET ALTERNATIVES TOILET REPAIR GUIDE TOILET TYPES Toilet Types, Flush Methods TOILETS, DON'T FLUSH LIST TRAPS on PLUMBING FIXTURES VAPOR BARRIERS & CONDENSATION in BUILDINGS VENTILATION in BUILDINGS WATER ENTRY in buildings ATTIC LEAKS Moisture or Mold BARRIERS, EXTERIOR WATER BASEMENT CEILING VAPOR BARRIER BASEMENT De-Watering Systems BASEMENT HEAT LOSS BASEMENT LEAKS, INSPECT FOR BASEMENT WATERPROOFING BASEMENT WATER ENTRY PREVENTION CATCH BASINS Chimney Leaks CONDENSATION or SWEATING PIPES, TANKS CONDENSATION on WINDOWS & SKYLIGHTS CORROSION in ELECTRICAL PANELS CRAWL SPACE DRYOUT PROCEDURES DEW POINT CALCULATION for WALLS DEW POINT TABLE - CONDENSATION POINT GUIDE DRYER VENTING DRYWELLS, FRENCH DRAINS for FLAT SITES DRYWELL DESIGN & USES EFFLORESCENCE, Salts & White / Brown Deposits ELECTRIC PANEL MOISTURE EXTERIOR WATER SOURCE ELIMINATION FLOOD Damage Assessment & Repairs FLOOD DAMAGED FOUNDATIONS FLOOD VENTS & FLOOD PORTS FLOODS IN buildings-priorities FOUNDATION DRAINS, INTERIOR FOUNDATION WATERPROOFING GEOTEXTILES & DRAINAGE MATS GRADING & SITE WORK, EXTERIOR GUTTERS & DOWNSPOUTS HUMIDITY CONTROL & TARGETS INDOORS HOUSEWRAP AIR & VAPOR BARRIERS LOG HOME Leak Diagnosis & Cure LOG HOME Condensation &Moisture MOISTURE in BUILDING WALLS, EFFECTS MOISTURE in CELLULOSE INSULATION MOISTURE CALCULATIONS MOISTURE CONTROL in BUILDINGS MOISTURE METER STUDY MOISTURE PROBLEMS: CAUSE & CURE MOLD in buildings MOLD PREVENTION AFTER FLOODING MOLD RESISTANT CONSTRUCTION PERIMETER DRAIN SYSTEMS ROOF VENTILATION SPECIFICATIONS Soffit Intake Vents & Attic Condensation SEALERS, Basement Floor & Wall Moisture SEWAGE CONTAMINATION SITE & SURFACE DRAINAGE SUMP PUMPS GUIDE SWEATING (CONDENSATION) on PIPES, TANKS VENTILATION in BUILDINGS VENTILATION DESIGN PROBLEMS & SOLUTIONS VENTILATION, WHOLE HOUSE STRATEGIES WATER ENTRY in BUILDINGS WET BASEMENT PREVENTION WINDOW / DOOR AIR LEAK SEALING HOW TO Window Flashing & Sealing Guide WINDOW LEAKS INTO BASEMENT WINTERIZE A BUILDING WATER PUMPS & TANKS & WELLS WATER SUPPLY & DRAIN PIPING More Information |
This article explains when, where, and how multiple or duplex sump pumps are used in buildings, describes the types of sump pumps, and describes how sump pumps should be installed, inspected, and maintained. InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers nor with topics or services discussed at this website.© Copyright 2012 InspectAPedia.com, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use page top links to major topics or use links at the left of each page to navigate within topics and documents at this website. Green links show where you are in a document series or at this website. Two Types of Sump Pump Installations - Simplex and Duplex PumpsA sump pump is normally installed in a pit at the low end of a basement or crawl space floor or in another location where water needs to be removed such as in a boiler pit or an outdoor well pit. Also see SUMP PUMPS GUIDE and SEPTIC SYSTEM PUMPS. On occasion we find that we need to install two or more sump pumps inside or outside of a building foundation to remove water from around the foundation of a poorly-sited (too low) building which has no natural drainage path to dispose of ground water by gravity.
Two Types of Duplex Sump Pump Installations: Alternating and ReserveReserve septic backup design: the backup pump never runs unless the primary pump has failed or is overloaded. A simple installation provides a pump control float switch that turns on the backup pump only water in the pumping chamber reaches a level above that normally handled by the primary sump pump. This approach provides both pump backup and the ability to handle surges in building water entry loads on the sump pump system. Alternating septic pump design: the two sump pumps are installed at the same location but are wired so that the pumps take turns, first one, and next cycle the other pump is turned on by the float switch. This dual pump hookup is more common among septic pumping stations than among home sump pump de-watering systems, but it may be appropriate where a large volume of ground water has to be kept constantly out of a building. An example we've seen was in the basement of a home on Long Island, NY in which the level of the basement slab was so low that flooding from Long Island sound would be nearly constant if the pumps failed. The alternating sump pump approach has the advantage that both pumps are being exercised regularly, which reduces the chance of the ugly discovery that in the event you have to rely on a backup sump pump which has been sitting idle, waiting its chance to run, has in the interim, died. Questions & Answers regarding this articleQuestions & answers about duplex sump pumps and backup sump pump systems to handle large basement or crawl space flooding or water entry Ask a Question or Search InspectAPediaHTML Comment Box is loading comments...
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