Grundfos circulation pump UP20-15N PN10 Rp3 / 4 150mm 1x230V circulation pump with 2000 phase 2000 running motor, external motor protection not required. The pump and motor form a single unit, ie maintenance-free bearing lubrication through the pumped medium, shaft sealing not required. The pump has the following features: - radial bearing made of Bathroom ceramics - axial bearing made of carbon - bearing Bathroom ceramics and canned Bathroom ceramics made of stainless steel - corrosion-resistant impeller, composite PES / PP - pump housing made of stainless steel The pump is equipped with a 2000 phase motor. This does not require any additional external motor protection.