20mm(DN15) 25mm(DN20) 32mm(DN25) 40mm(DN32) 50mm(DN40) 63mm(DN50) 75mm(DN65) 90mm(DN80) 110mm(DN100). Material: UPVC (Unplasticized Polyvinyl Chloride). UPVC check valve have high strength, water pressure resistance, impact resistance, long service life.
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