FanGuard Radon Fan Condensate Bypass Kit – 4″ Designed to prevent condensation, rain or melting ice from damaging your radon fan. Connects to schedule 40 PVC Includes condensate collector coupling with tube connector, loose tube connector, 3′ of drain tubing and 3′ of tubing insulation. To install – interrupt PVC pipe above fan with special coupling. Drill 7/16″ hole below fan – within 36″ of FanGuard. Thread hole with 1/4″ tapered pipe tap. Cut hose and insulation to length and attached to barbed ends of the two pipe tap fittings.