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.
When 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.
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:
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|
|Dual Check Valve 3/4"||$26||--|
|Integral Atmospheric Vacuum Breaker (AVB)||$36||--|
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.
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.
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.
This kit will save you money – the value of extra parts is over $50.
"After fearing for my man cave's fate during hurricane Sandy last year I decided I needed a backup sump pump. After much consideration I decided to go with a water powered unit. I purchased the RB-750 and finished installing it this past weekend. Went together great and I was very pleased with the quality of the pump. Also it came with the additional connections which added to the flexibility of the install..." – John V., MD
"Just completed installation of a RB-750 and everything went smoothly. I was pleased to see that everything necessary was included and the instructions were clear. Pump operates normally and works as advertised. Also, I want to thank you for using environmentally friendly packing material..." – Michael B., IL
"I installed the backup sump pump RB-750 myself and I am just a software engineer. It took me about 3.5 hours and it was not difficult at all. The hard part was..." – Brett R., IN
"I moved into a home in July which had a finished basement and I was disclosed that the sump pump system was "newer", but the previous owner did not install a backup system. Well it began with a massive weather system that dumped over 7 inches of rain on Halloween day 2013. All day and up to this point the main sump pump system was working and keeping the basement dry. However around 7pm there was a power flicker and this was the straw which broke the camel's back.. It shut the main sump pump off,..." – Chris R., KY
"...the first time the water was turned on and the water in the sump lifted the float I actually got very worried because it was quiet and I didn't think it worked. Then, I noticed the water going down in the sump..." – Philip B., Ohio
See more Testimonials
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!
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).
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.
|Sump Water Removed (GPH)
||Sump Water Removed (GPH)
||Sump Water Removed (GPH)|
|Water Connection||3/4" (or 1/2")||3/4"||3/4"(adaptor incl.) or 1"|
|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|
|click to enlarge!|
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).
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.
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), 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.