bids are invited for custom bid for services - alds amc customized amc/cmc for pre-owned products annual maintenance contract of auto lpg dispensing station (alds) under u.p. state office-i cleaning of lpg strainer / filters in the lpg dispensing system  water draining from the underground lpg tank once a month  checking of the breakaway coupling  lpg dispenser hoses to be checked – visually, hydro tested & replaced every 1½ years  checking of the lpg dispenser nozzle and certifying that it dispenses only when it is properly connected to the vehicle  checking of the over speed device of the lpg dispenser – to certify it shuts the remote pump and solenoid valve upstream of the hoses in case of an emergency  checking whether the density of the fluid is correctly entered in the dispenser.  checking temperature compensation system of the lpg dispenser  checking the preset functions of the lpg dispenser  checking the low flow rate cutout of the lpg dispenser  leak tests of all the hydraulic joints of the lpg dispensers and the total piping system total quantity :