Are you trying to guess which sump pumps we believe to be the best sump pumps for the basement? Here is a clue. Their outer body is green and its made in the USA by a company that was founded in 1939. So we think you are guessing it is a Zoeller. If you are not already aware, Zoeller introduced two upgraded models, the M63 and M95. We believe these are the best sump pumps for the basement because they use quality materials, utilize good design features, and offer aveage and above average greater pump performance curves, and undergo two tests before leaving the factory. Here is the detail to support our best choices.
Quality material includes cast-iron, powder coated epoxy finish, cold rolled steel, solid polypropylene, neoprene, viton, and stainless steel. Learn how each of these materials is used and why they are quality rated.
Cast-iron is used for the parts where quality counts: the impeller, the motor housing, the pump housing, the cap where the switch is housed, and the base.
Using cast-iron provides the following Benefits. It adds longevity to pump life because it dissipates heat very well, adds weight to the pump to keep it more stationary in the basin and does not dent, chip, crack or wear down. The grade used in class 25-30 25000# textile strength with a BHN (Brinell Hardness Number) between 170 and 229.
The two main killers of a pump motor is heat and water. During heavy pumping the motor heats up and needs a material such as cast-iron which dissipates the heat very well. Many competitors use canned motors which are purchased from a third party. A canned-motor is placed in stainless steel housing and does not dissipate heat as well. The motor is designed to last a long, long time because sleeve bearings have an infinite life span and the motor is sealed with carbon and ceramic which withstands vibration. The oil provides lubrication during the rotation and movement of the shaft.
Using cast-iron for the pump and motor housing, the impeller, the cap and the base adds an additional ten to fifteen pounds. Obviously this much weight makes a difference in keeping the pump more stationary in the basin during heavy, continuous operation.
Using cast-iron for the impeller protects the impeller from nicking when small pebbles are whirled through. Many competitor use engineered plastic which will nick over time and show wear.
Cast-iron will rust unless protected. Therefore Zoeller uses a powder coated epoxy finish which is electrostatically applied. The special application coating keeps the pump from rusting and keeps the outside looking good with water hose down even after sitting in the basin ten to fifteen years.
AISI 1215 cold rolled steel is used for the motor-shaft because is strong and can withstand the rotation and vibration over long periods of time.
Solid polypropylene is used for the float because it is buoyant and solid which means it will responds easily to the rising and lowering of the water level and even if punctured will not sink and cause failure. It will keep on floating in the water.
Neoprene is used for the gasket. It provides an ultimate seal for the switch case protecting against moisture. Unless sealed tightly, moisture will kill the switch.
Viton is used as an outer boot for the float switch, the seals and cord plug. As industry progresses, more effective materials emerge. Viton is used to cover the carbon and ceramic seals because it is much more resistant to wear and chemical effect. It protects the float switch from moisture and comprises the material for the plug.
The stainless steel float guard, handle and fasteners will not rust. Fortunately a float guard exists because so often unprotected floats get too close to the basin wall and get caught in the ON position causing pump failure.
The quality features include an upgraded float switch, a green LED lighted plug, a nono-clogging impeller, and an airlock hole. Laern more about these quality design features.
Imagine a float switch guaranteed for 5 years. The M63 has been upgraded to Premium status which includes a stronger switch built to last longer than the original M53 switch. Zoeller recognizes the greater volume of water flowing into a basement these days and has responded with a upgraded float switch.
The green LED lighted plug will remove your doubts about electic current availability. The plug end of the cord stays lite as long as there an electrical current. If the circuit breaker has tripped and no electricity is flowing the plug will be unlite.
The need to clean a bottom screen is eliminated. The Zoeller M63, as well as all Zoeller sump pumps, have no screen requiring maintenance. The vortex impeller passes one-half inch spherical solids like debris and pebbles. The distance between the volute, a curved funnel that increases in area as it approaches the discharge port receiving the water being pumped by the impeller, and the top of the impeller determines the size of solids handling capability. For the Zoeller M63 and M95 the distance is one-half inch. This open impeller style is much less likely to clog than a competitor who uses the semi open impeller design with impeller or the closed impeller design which uses a screen.
Some manufacturers decided to put an air-lock hole down at the base of the pump, Zoeller has decided to ask the installer to drill a 1/8 inch hold at a downward slant slightly above the pump discharge port in the discharge pipe. The decision is based on the fact that a how in the pump-base can get clogged much easier. Failure to drill an anti-air lock hole can result in the pump becoming air bound and only pumping air and no water.
The pump performance curve of the M63 is 43 gallons per minute (2,580 GPH) at a total dynamic head of 5 feet. Total dynamic head includes the vertical height and the check valve, elbow and horizontal friction loss. At 10 feet the flow is 34 gallons per minute (2,040 GPH) and at 15 feet the flow is 19 gallons per minute.
The Premium Model M95 has a higher pump performance curve. The M95 has all of the same features and quality materials as the M63 except for greater pump performance. At a 5 foot total dynamic head, M95 is capable of pumping 80 gam (4,800 GPH); at 10 feet it can pump 66 GPM (3,960 GPH) and at 15 feet it can pump 49 GPM (2,940 GPH).
Each pump goes through a leak test to ensure that all gaskets, seals and mating surfaces will hold under pressure.
Each pump goes through performance testing by running underwater with incoming water flowing at the performance curve rate to ensure that it is capable of its published head capacity and flow rate.
As a result of these two tests, Zoeller can be assured the pump will work when installed properly.
Zoeller has built a reputation over the past seventy-nine years (as of 2018) of building with quality that is lasting so homeowners can have peace of mind during heavy continuous rainstorms. Even today when we talked with a Zoeller technical engineer, one of the first things he said about the M63 and M95 is that because of stronger rainstorms these days we at Zoeller wanted to come up with a float switch that would last longer before replacement was required. The engineer then proceeded to talk about the other built in quality factors listed above.
Plumbers like happy customers; therefore they prefer to install Zoeller because it will outlast other brands.
Studying the customer reviews on Amazon, one of the websites with the most customer reviews, reveals a strong 4.2 and above out of 5 product approval ratings.
The cost for both models is comparable to competitor brands, however, the Zoeller M63 and M95 have more cast-iron parts which increases pump longevity and dependability.
The Zoeller M63 and M95 are truly Premium models and the best sump pumps for the basement. Quality materials such as cast iron used for the motor and pump housing, impeller, switch case and base; cold steel used for the motor shaft, solid polypropylene used for the float making it unsinkable, viton used for the switch case and covering over the seals, quality design upgrading the float switch to perform more pumping cycles before replacement, a non clogging designed vortex impeller, a lighted plug indicating an active current, and leak and performance testing of each pump all support the characteristics of best sump pumps for the basement. No competitor uses the same grade of material for so many components, offers a five year warranty and tests each pump so thoroughly before it leaves the factory. .
Check out the Zoeller M63 and M95 now. Enjoy the peace of mind a best sump pump in the basement brings when.those heavy rainstorms come.
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