Have been thinking of starting my own garden and any tips would be great :)
Clean and flux the two elbows and lower them into position onto the two uprights. Then sweat the joints as normal. I myself would have used compression joints here, because too much heat on th e piework near a new valve, can cause the rubber seal inside to soften
Fire zones for firefighting purpose are used to determine the maximum amount of firewater required by your plant and thus size the firewater main ring. Usually a fire zone is identified by taking into account the delimitation given by fixed structures, i.e. pipe rack, access way, perimeter of the unit. Once you identify a fire zone, then you can calculated the maximum amount of firewater required for that zone. The calculation of firewater is usually done by considering all the fixed water spray systems dedicated to equipment being working, plus the contribution of 1 firewater monitor, plus the contribution of 2 hydrants. These last two have a fixed capacity and give a constant contribution to the different fire areas. Once you do this calc for the fire zones then you can decide which is the controlling one and therefore size the main ring.
