Hi & Dry Water-Powered Backup Sump Pumps

Superior Performance and Reliability

The reliability of your primary sump pump is very important but it is absolutely critical for the backup sump pump, which is your "last line of defense" against basement flooding and thousands of dollars in damages. During a severe thunderstorm or a big snowmelt, you don't want to worry about your sump pump and power outages, or about the old battery on your back-up sump pump. Top 10 reasons why sump pumps fail.

water-powered backup sump pump photoWhen called to duty, water-powered sump pumps do not depend on electricity or batteries because they are powered by municipal water. And as long as water is available, they can run infinitely! They have no impeller or motor – there are no rotating parts to break or wear off. No cleaning or maintenance required.

This is a truly simple and elegant design which uses an old, well-proven principle – that’s how they make vacuum in school labs! Pressurized municipal water pushes through the pump and as it speeds up through a Venturi nozzle, its pressure drops. This creates suction. The sump pump ("ejector") draws water up from the sump pit below by suction just like through a giant soda straw.

What Makes Hi & Dry™ Water-Powered Backup Pumps Better?

Location, location, location! They are not submerged inside a filthy sump pit like other back-up sump pumps. Our Hi & Dry™ pumps are mounted "high and dry" on the ceiling. This results in:

  1. THE HIGHEST PUMPING RATES (by far) in the industry.
  2. THE HIGHEST RELIABILITY – BACKED BY A 5-YEAR WARRANTY ( unmatched in the industry).
  3. SUMP COVER – you can seal the sump against radon, vapor, and for safety.
  4. IDEAL FOR TODAY'S SMALL PITS (below 18" diameter, even 10").
  5. THE LONGEST SERVICE LIFE – estimated 25 years or longer.

Comparison of Water-Powered Backup Sump Pumps

Water Powered Backup Sump Pump by RadonSeal

Order Today!

Hi & Dry™ Water-Powered Backup Sump Pumps are not sold in stores but delivered directly from the factory to your door. Orders received by 1 PM ET are normally shipped the same day and delivered by courier (via UPS) within 2 to 5 workdays within the lower 48 states. Shipped as Complete Sump Pump Installation Kits with accessories and a water alarm.

Hi & Dry™ Water-Powered Backup Sump Pumps
Item Price Shipping  
Pump RB750 $198 $11 Order Now button
   Pump RB750-EZ $279 $15 Order Now button
Pump HB1000 $289 $15 Order Now button
   Pump HB1000-PRO $359 $20 Order Now button
Pump CB1500 $395 $20 Order Now button
Dual Check Valve 3/4" $26 -- Order Now button
Integral Atmospheric Vacuum Breaker (AVB) $36 -- Order Now button

Based on shipping by courier to the lower 48 states. For expedited shipping or shipping to other states and Canada, please inquire first by telephone or e-mail. Regarding shipping, returns and other terms, please review our Commercial Terms.

30-DAY MONEY-BACK SATISFACTION GUARANTEE – If not completely satisfied, you can return the pump for a full refund of the price, excluding shipping costs, within 30 days of shipment. You must phone first for shipping instructions. When shipping the pump back (at your cost), we suggest you also purchase a shipping insurance.

FIVE-YEAR WARRANTY – We warrant the pumps against all defects in material and workmanship for a period of five years from the date of shipment. You must phone first for shipping instructions. When shipping the pump back (at your cost), we suggest you also purchase a shipping insurance. At our option, we will replace or recondition the product and ship it back at no charge to the you.

Which Size Do You need?

If your primary pump has to handle lots of water, you need a larger backup pump. However, you must first confirm with the "bucket test" that there is a sufficient volume of municipal water available.

  • RB750 is for normal volumes of sump water – when your sump pump cycles are over 5 minutes apart,
  • HB1000 is for larger volumes of sump water – when your sump pump cycles are under 5 minutes apart,
  • CB1500 is for very high volumes of sump water – when your sump pump cycles are under 2 minutes apart.

IMPORTANT! Make sure that there is sufficient water pressure and water flow (The "Bucket Test")!
How to calculate the water inflow into your sump pit.

The Easiest Pump to Install? The RB750-EZ !

This is the RB750 Pump Installation Kit plus:RB750-EZ water-powered backup sump pump

  1. Push-in brass connectors – a male adaptor (pre-assembled) and a connector Tee for quick, solder-free connections to the home water supply. Push-fit release tool.
  2. Brass shutoff ball valve (pre-assembled) - a good plumbing practice.
  3. Brass vacuum breaker (pre-assembled) – an integrated, approved backflow preventer that meets plumbing code standards (ASSE #1011 Certified; UPC, IAPMO Approved; CSA Standard B64.2).

This represents over $50 of extra parts. You'll need to provide some basic tools such as a screwdriver, saw, drill motor, tape measure, pipe cutter, and channel pliers.

The Most Popular Kit? The HB1000-PRO !

HB1000-PRO water-powered backup sump pump
  1. Push-in brass connectors – a male adaptor (pre-assembled), a connector Tee, Push-fit release tool.
  2. Brass shutoff ball valve (pre-assembled) - a good plumbing practice.
  3. Brass Dual Check Valve (pre-assembled) – an integrated, approved backflow preventer that meets plumbing code standards (ASSE #1024 Certified; UPC, IAPMO Approved; CSA Standard B64.6).

This kit will save you money – the value of extra parts is over $50.

What Makes These Pumps the Best Deal?

These are the most reliable pumps on the market – backed up with a 5-Year Manufacturer's Warranty, the longest in the industry. Note that some plumbers promote their own pumps regardless of performance or reliability. Insist on a good design!

  • KEEPS CLEAN, LASTS LONGER – The Hi & Dry pump is not exposed to the grime and debris inside the pit or to corrosive salts from a water softener. No deposits buildup and no corrosion. Maximum reliability and service life – estimated 25 years or longer.
  • HIGHER PUMPING RATE – Other pumps sit down in the sump pit and have to push up to the discharge not only the sump water but also all the municipal water. Hi & Dry pumps, being mounted on the ceiling, let the city water flow right through and have to pull up only the sump water. This results in a much higher pumping rate from the sump. At the same lift, the pumping rate is more than double of the other pumps. They generate such a high vacuum (over 27" Hg) that they can pull water upwards over 15 ft.
  • BACKFLOW PREVENTION – Other designs located down in the sump are susceptible to backflow due to the column of water standing in discharge pipe. Without a backflow preventer, the sump water may find its way back into your drinking water.
  • TWICE AS EFFICIENT – At 90 psi municipal water pressure, our pumps use only 1 gallon of city water to remove 2 gallons of sump water – twice as efficient as other pumps.
  • SUITABLE FOR SMALL PITS – The only solution for smaller sump pits, even as small as 10" in diameter. Other pumps with their mechanical floats need at least 18" in diameter.
  • SUMP PIT COVER – The sump pit can be covered and sealed against water vapor and radon gas. Just caulk around the penetration through the cover. Other pumps with their bulky designs do not allow the pit to be covered – also a hazard to children and toys.
  • DRAINS THE PIT – The suction pipe reaches to the bottom of the sump pit and the pump empties the entire pit in each cycle. The ejector runs for full 15 to 45 seconds (adjustable). Other backup sump pumps have mechanical floats with limited travel of several inches and empty the pit only partially. This means frequent pump cycling and a short service life.
  • NO INTERFERENCE – Hi & Dry pumps do not interfere with the primary pump or its float inside the pit, which is the cause of many pump failures.
  • ON/OFF SWITCH – Our hydraulic float switch has a positive on/off action. Mechanical switches, particularly when exposed to dirty sump water, can get stuck in a partially open condition, which would send city water into the pit and flood the basement.
  • LOUD ALARM – High water alarm with output relays is included. This loud 85 dB alarm lets you know that there is something wrong with the power supply or the primary pump. It is required in some states but is not included with other pumps (value $30). You can connect it to your security system or even an auto-dialer. Set it up to call your cell phone.
  • DIY INSTALLATION – Our pumps come as a complete D-I-Y installation kit, making the installation simple for homeowners or contractors.
  • HEAVY DUTY – The pumps are constructed of heavy duty, corrosion-resistant materials (Schedule 80 polypropylene) for practically unlimited service life.

Basic Set-Up of the Hi & Dry Emergency Sump Pump

installed water-powered backup sump pump illustration

The operation is fully automatic – it works whether you are home or away. The backup pump has its own float switch, which activates the pump when water level in the sump pit rises too high – above the level normally allowed by the primary sump pump. This also activates an audible high water alarm to let you know that there is something wrong with the primary sump pump or its power supply.

SUCTION PIPE – The suction pipe (PVC pipe not included) reaches down to above the bottom of the sump pit and is connected to a check valve (included) below the pump.

DISCHARGE HOSE – A flexible discharge hose from the pump takes the water through the basement wall to a separate discharge, which is the recommended setup. In case the discharge pipe freezes up, the included pop-up pressure relief valve will spill the water onto the backyard, allowing the backup pump to still operate. If the sump pump discharge leads to the municipal sewer, leave an air gap of at least 1" to protect against backup.

Alternatively, the discharge hose can be connected to the main discharge pipe from the primary pump using a T-connector (included). In this case, install the pop-up valve on the main pipe to protect against freeze-up. Make sure that your check valve above the primary pump is in good working order to prevent back-flow into the sump pit.

ADJUSTABLE HYDRAULIC FLOAT – The hydraulic (not mechanical) tethered float switch is not dependent on electricity or a battery. Its activation elevation is fully adjustable. It is connected to the pump by flexible pressurized tubing, which is clipped on to the suction pipe. To help with the limited space inside sump pits, the minimum needed lift of the grapefruit-sized float is only about 1". Its function is to start and stop the pump. It does need to fully drop down to its lowest position to turn off the pump. There is an adjustable timer screw on the pump, which adjusts how long the pump works after the float drops in each pumping cycle as needed to empty the entire pit (typically set at 20-30 seconds).

Installation Instructions

Pump Performance vs. Water Pressure

Municipal Water Pressure – The volume of sump water drawn into the ejector depends on the city water pressure. The higher the water pressure, the higher the pumping rate. The higher the needed "lift" from the bottom of the sump pit, the lower the pumping rate. But it does not decrease dramatically up to a 15-ft. lift.

Pumping Rates for All Models Based on a 10-ft. Lift
Pump Model RB-750 HB-1000 CB-1500
Water Pressure
Sump Water Removed (GPH)
Sump Water Removed (GPH)
Sump Water Removed (GPH)
40 700 900 1,400
60 750 1,000 1,500
80 800 1,200 1,700
100 900 1,400 2,000
Water Connection 3/4" (or 1/2") 3/4" 3/4"(adaptor incl.) or 1"
Suction Pipe,
Discharge Hose
1" 1-1/4" 1-1/2"
Typical Use Residential – homes with normal amount of sump water Residential/Commercial –homes with high volumes of sump water Commercial – buildings with very high volumes of sump water

Complete Pump Installation Kits

sump pump parts included
click to enlarge!
  • Pump (ejector) made from heavy-duty polypropylene.
  • One-Way Check Valve to prevent reversal of water flow down into sump.
  • Mounting Clamps and Screws.
  • PVC Fittings to connect your suction and discharge piping.
  • 3-ft. Flexible PVC Discharge Hose.
  • Cable Tie Straps.
  • Hydraulic Float and Transfer Tube for hydraulic signal.
  • Suction Screen.
  • Independent High Water Alarm with a 9 V battery and relay outputs.
  • Fully Illustrated Instruction for DIY Installation

Backflow Prevention is About Safe Drinking Water

Every water company receives each month several calls from homeowners complaining about "blue water" from their faucets. They and perhaps also their neighbors have been drinking their own toilet tank water which has been colored by toilet bowl cleaner! Instead of a "plumbing code approved" toilet flush valve, they had bought a cheap one.

If a nearby fire hydrant is turned on or a water main breaks, the sudden loss of water pressure may cause "back-siphonage" and draw contaminated water into the potable water system. If your neighbor is using a garden hose to fill a swimming pool or to spray pesticides on his lawn, it may end up in your drinking water due to a sudden backflow. According to an US EPA study, a majority of homes have a water cross-connection to a health hazard.

In spite of regulations and building codes on backflow prevention, many products sold in stores to trusting homeowners do not meet them. Conspicuous among them are the old-school water-pressure pumps that sit in the sump pit. Their discharge pipe is filled with sump water and they are likely to contaminate drinking water during a sudden loss of water pressure. The manufacturer's instructions recommend and some states require the use of an RPZ (Reduced Pressure Zone) Backflow Prevention Device, which costs over $150. Moreover, it restricts water flow to the pump and requires annual certification (about $60–80 each year).

Backflow Prevention Devices

Built-in Backflow Prevention – The Hi & Dry main ejector valve has a solid rubber diaphragm, which reliably isolates sump water from the municipal water, and a patented integral check valve that closes the main valve drip-tight by using the pressure of municipal water – the water cannot flow backwards. More obviously, when mounted on the ceiling with suction and discharge pipes empty, any backflow suction would just suck in air through the discharge pipe. The suction pipe and discharge pipe are connected through the Venturi nozzle and are filled with air.

Regardless of the pump design and setup, local authorities may insist on a special backflow prevention device.

Double check valve

Dual Check Valve – You can order the optional dual check valve, approved backflow preventer that meets plumbing code standards (ASSE #1024 Certified; UPC, IAPMO Approved; CSA Standard B64.6). It contains two internal check valves to prevent backflow (reverse water flow) through the pump. No effect on water flow to the pump. Thread it directly onto the pump. It also acts as a union. No extra shipping cost when ordered with the pump.

AVB – To satisfy the strictest local codes, order our optional integral Atmospheric Vacuum Breaker (AVB)Integral AVB vaccuum breaker, which is approved by all backflow prevention authorities (ASSE listed 1001, IAPMO listed, CSA certified). We ship it factory-installed on the pump inlet. Note the pump must be installed horizontally and the AVB must be at the highest point. The discharge pipe from the pump must be sloping and self-draining – otherwise, the water would run out of the AVB valve. No extra shipping cost when ordered with the pump.