rough order of magnitude (ROM) Definition. An estimate of costs and time provided in the early stages of a project when its scope and requirements has not been fully defined. An ROM is used to reduce the uncertainty of cost outcomes for both parties when project details have yet to be identified. Use this term in a sentence.
Prior To Fitting Your Wickes Water Softener. The water softener must be installed inside a plastic water tank, this tank should then be you may hear a hissing noise as the water rushes through the valve. Once the hissing noise has stopped, open the outlet valve and run some water.
Clasp down the lid and on the highest pressure setting (if you have one) bring the whole to a hissing angry crescendo on high heat. Turn down the heat so the hissing is gentle but constant and set your timer for 25 minutes. Switch off the heat and let the pot de-pressurise as per instruction manual.