12 Low Pressure IDENTIFY YOUR WATER SYSTEM FOR EXAMPLE WATER PRESSURE CAN BE CALCULATED AS FOLLOWS Upstairs bathroom shower 1 m 0 1 bar pressure Upstairs bathroom basin taps 2 m 0 2 bar pressure Kitchen Tap 5 m 0 5 bar pressure GRAVITY FED LOW PRESSURE SYSTEMS Your home has A cold water storage tank in the loft A hot water cylinder usually in an airing cupboard NO shower pump How does it work 1 Cold water is fed to a storage tank in the loft 2 Water passes to a cylinder where it is heated by a boiler circuit flow 3 The pressure of water is determined by distance from the bottom of cold water tank to the top of highest outlet Fig 2 Fig 1 Fig 2 By identifying the plumbing system in your home you can select the product that is best suited to your water pressure The majority of GROHE s products can be used with most systems and we have a number of products that are suited to low Pressure Water pressure is measured in Bar Please refer to the diagrams to help identify your water system GRAVITY FED SYSTEMS Measure from the base of the cold water tank to the exact position of where the water is coming out from in a vertical measurement if it s a shower it will be to where the shower head is or if it s a tap to where the spout of the tap finishes For each meter in vertical distance you will have 0 1 bar in pressure So if you select a kitchen tap that requires 0 5 bar pressure then you will need 5 meters in vertical distance if you select a basin tap that requires 0 2 bar then you will require 2 meters as you will see in the below drawing MPL UK en GB 00 3 Main Intro indd 12 06 02 20 09 41

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