1999 Polaris SLH, SLTH, SLX, SLTX, PRO785 Factory Service Manual, Page 129Get this manual
FUEL SYSTEMCARBURETION Fuel Tank Vent System Operation
The fuel tank vent system consists of an inlet check valve and pressure relief valveThe inlet check valve allows air to enter the tank as the fuel supply is being used The pressure relief valve maintains 1-1.5 PSI positive pressure in the fuel tankIf pressure in the tank exceeds 1.5 PSI, the valve releases and excess pressure is allowed to escape
Routing
SLT Models Refer to Illustration on page 3.61 The inlet check valve line leads from the 'T' fitting near the drop tube retainer cap around the right side of the craft and is attached to the main fuel line cluster with aT-Clip (PN 7080482)The pressure relief valve line leads from the other side of the "T" fitting, under the steering pod, to grommet located near the front seat hold down latch
Fuel Tank Pressure Relief Valve