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Sand Point well and Jet Pump

Sand Point Well Installation

In Northern Wisconsin, the plan is to install a sand point well 200 feet from the future cabin. The primary concern is preventing the cast iron jet pump from freezing.

Well Location and Protection

Options include locating the well directly below a future unheated sauna or shed, or placing it elsewhere and building an insulated bunker below grade for the jet pump, with lines running below frost depth to the cabin.

Bunker Design and Depth

Questions arise regarding the depth and design of the well bunker, considering materials like ICF, foam, or pallets.

Winterizing Wells

In similar temperature zones, it's common to either keep the place heated or winterize the well in the fall.

Well Regulations and Permits

Wisconsin has well regulations on the state website, requiring a permit before starting DIY work to protect groundwater.

Cabin Heating and Water Line

The cabin will be heated, but the water line from the well and pump to the cabin will be buried.

Well Pits

Digging below grade for a well may not be permitted anymore, according to the UDC. The DNR web page has well resources and a link to getting the permit.

Prohibition of Well Pits

The construction of well pits was prohibited by the 1953 Wisconsin well code due to poor construction, flooding, and unsanitary conditions. New well pits require written approval from the DNR and must meet stringent and expensive construction specifications.

Submersible Pumps as an Alternative

An alternative to jet pumps is using a submersible pump to prevent freezing. A drain back valve can clear water from lines with freeze potential. A pitless device installed below the frost line can prevent freezing.

Submersible Pumps in Sand Point Wells

Submersible pumps can be used in sand point wells by installing them after pounding down the sand point, ensuring they fit inside the well casing. The water line needs to exit the well casing below the frost line.

Soil Type

A driven well may not work unless the soil is sand.

Submersible Pump Options and Costs

Researching submersible pumps reveals limited options for smaller casings and potentially high costs. Larger casings may be beyond DIY installation.

Water Level and Pump Depth

The pump needs to be at least 10' below static water level, possibly more with a small diameter pipe. Pumps lose capacity the deeper they go.

Installing Submersible Pumps

Install the pump after pounding down the sand point. Buy one that fits inside the well casing and slide it down. To keep things from freezing, the water line needs to exit the well casing below the frost line.

Burying the Pump

The pump can be buried as long as there is a Tee and a section of the pipe extending a foot above the land.

Pipe Size Considerations

Limiting pump options may result from not worrying about a pump and pipe size.