The right machine for most residential NH septic replacements. It reaches 4+ feet with precise bucket control for clean leach field trenches, runs on rubber tracks that minimize lawn damage, and fits on most NH residential lots. If your tank is accessible and your soil is typical NH loam over hardpan, start here.

When your design calls for tank pits deeper than 6 feet, or when you’re working on a large system with extended leach fields, step up to the U55 or KX057. Both reach 10+ feet and have the hydraulic force to work through compacted hardpan. Also the right choice when a breaker attachment is needed for shallow ledge.

For back yards with fence gates, narrow side yards, and constrained residential lots, the U17 fits through openings as narrow as 36 inches and the K008 squeezes through 28-inch gates. Both reach septic depth (4+ feet). If your installer needs to access a rear septic area through a standard fence gate, these are the machines that get it done without removing the fence.

NH’s frost line is 48 inches — among the deepest in the continental US. Distribution pipes and system components must be protected from freezing, which drives depth requirements that often exceed what homeowners in other states expect. Your licensed designer accounts for this in the system plan.

Properties within 250 feet of a lake, pond, river, or tidal water face additional restrictions under NH’s Shoreland Water Quality Protection Act. This affects a significant portion of the properties NorthPoint serves from our Tilton and Ashland stores across the Lakes Region. Your designer will navigate these setbacks, which often require creative placement or alternative system designs.

Late March through April brings saturated soil that complicates septic excavation. Wheeled equipment bogs down. Rubber-tracked mini excavators distribute weight far better. If your project falls in spring, specify a tracked excavator from NorthPoint and allow extra time as soil stabilizes after frost leaves the ground.