Info

Water Heater/Boiler Diaphrams

   Circular Cisterns TxBxD (TopxBasexDia)
AX 25 Round Cistern 28x24x20 - AX 40 Round Cistern 32x28x24 - AX 50 Round Cistern 34x30x25
AX 60 Round Cistern 37x33x25 - AX100 Round Cistern 42x37x30 - AX130 Round Cistern 42x37x37

Cable sizes and switch sizes for Electric Showers (Rule of thumb)
N.B. Manufacturer's instructions should be observed as they may for one reason or another have a different recommendation.

Shower Valve Centres 
Mira 88/Gem 153mm C/C Minimum Pressure 0.1 Bar, Maximum Maintained 1.5 Bar, Maximum Static Head 5 Bar Manual Mixing Only
Mira 8 154mm C/C, Manual Valve
Mira Realm 175mm C/C Minimum Pressure 0.1 Bar, Maximum Maintained 3 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 5:1
Realm OK for Gravity 3.3 Head, Fully Modulating Gas Heater, Mains Pressure Cylinder, Pumped
Mira 415/Combiforce 153mm C/C Minimum Pressure 1 Bar, Maximum Maintained 5 Bar, Maximum Static Head 10 Bar, Combis
Mira Excel 153mm C/C Minimum Pressure 0.1 Bar, Maximum Maintained 5 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 10:1
Mira Verve 153mm C/C Minimum Pressure 1 Bar, Maximum Maintained 5 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 10:1
Mira Select 153mm C/C Min. Pressure 0.1 Bar, Maximum Maintained 1 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 10:1
Mira Fino 153mm C/C Minimum Pressure 1 Bar, Maximum Maintained 5 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 10:1
Mira Mode 110mm C/C Minimum Pressure 0.1 Bar, Maximum Maintained 6 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 5:1
Mode OK for Gravity 3.3 Head, Fully Modulating Gas Heater#, Mains Pressure Cylinder#, Pumped if using extra on mains appliances a pressure reducing valve must be used so as not to exceed 5 bar maintained.
Mira Montpellier 6" & 8" Rose 193mm C/C Minimum Pressure 0.2 Bar I think more, Maximum Maintained 5 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 5:1
Mira Montpellier 12" Rose 193mm C/C Minimum Pressure 0.5 Bar I think more, Maximum Maintained 5 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 5:1
Mira Extra Minimum Pressure 0.1 Bar, Maximum Maintained 5 Bar, Maximum Static Head 10 Bar, Maximum Pressure Loss Ratio 5:1
Extra OK for Gravity 3.3 Head, Fully Modulating Gas Heater#, Mains Pressure Cylinder#, Pumped if using extra on mains appliances a pressure reducing valve must be used so as not to exceed 5 bar maintained.
Mira 723 152mm C/C Thermostatic Valve
Mira 722 169mm C/C Thermostatic Valve
Mira Advance ATL Temp Range 37-48c - Max temp can be set by the installer.
Aqualisa Aquavalve 150mm 3/4" Inlet (Grey Cartridge 6:1 Pressure Difference/Manual 3:1 Max Diff) Maximum Pressure 100psi
Pink Cartridge Cold Mains Range 20-100psi, Hot 3-5psi Max pressure diff. 33:1
Ultra Prima 130mm Centre/Centre
Marflow Consort Exposed Bar Thermostatic 150mm Centres
Marflow St James Valves 150mm Centres
Derby/Victoria Shower Valve 150mm
Elite Thermostatic 140mm
Imperial (Tre Mercati) 155mm
Meynell V6 110mm Centres
Trevi 400 Built In c/c 127mm
Trevi 410 Exposed c/c 127mm
Trevi 300 Therm Built In c/c 71mm N.B. Connections are vertical, other valves are horizontal
Trevi 310 Therm Exposed c/c 50mm
Trevi 320 MK11 Exposed c/c 151mm
Trevi Compact Valve Adjustable 147 to 155mm
Trevi Traditional 311 Valve connection face outward not back to wall, no dims.
Trevi Hatherway c/w 138-145mm
Tre Mercati Caravan Built In Mixer 100mm Centres

Flue Gases
Nat Gas Flue Gas Temp 260 C
Soild Fuel 500 C or Higher, Plus Aggresive Sulphur & Chlorine Base Acids
Oil 28 Second Flue Temp 250C (Docherty Oilmaster)

Oil Info
CF Oil Boilers are set up for 28 Sec oil (Kerosine), they can be converted to 35Sec (Heavy Oil)
RS Oil Boilers can only run on 28 Sec oil, there is no conversion is available for 35 Sec on RS/BF boilers. 28 Sec Oil is known as Kerosene Oil - 35 Sec Gas Oil
CF or BF not suitable for Red Diesel 32 Sec

Water Meters
Class A - Secondary meter used to measure low flow rates a (as accurate as Class D meters with a maximum flow rate of 150l/hr) Class A also known as 'Single Jet'
Class B - Standard Secondary water meter. N.B. Class B meters will not measure low flow, i.e. will not detect/measure a small leak in pipework or faulty ballvalve.
Class C - Used in situations where Class D meters are lible to jamming due to sand & gravel in the water supply. However whilst Class C (Multijet) meters are prone to over reading due to high sediment levels.
Class D - Primary water meter (as fitted by water supplier) Prone to Jamming because they are Turbine.

Potterton EP2000 Oblong Battery Varta NI-MH 3/V150H 3.6V 140 mAh