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The Motorised Submersible Canoe (MSC), nicknamed Sleeping Beauty, was built by the British Special Operations Executive (SOE) during World War II as an underwater vehicle for a single frogman to perform clandestine reconnaissance or attacks against enemy vessels.

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Can you help please?

I have been advised by two plumbers but both say different things. I paid one £500 to do some work which was ok but I still have a problem. Can anyone here help me please so I can decide which of these guys is right? I have a regular boiler which I believe is open flue. I have a thermostat on...
- idkwia
- Thread
- Jan 8, 2010
- boiler central central heating system control cylinder fitting flow heater help high hot hot water immersion heater motorised valve please plumber problem radiators sink tap temperature thermostatic valve water winter
- Replies: 25
- Forum: Plumbing Jobs | The Job-board
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Hot Water only luke warm

I have recently replaced my old hot water cylinder as the old one was leaking. The system is an indirect type, using gravity feed to heat the hot water and a pump for the 7 radiators. The original hot water tank was very old and allowed the boiler hot water circuit (i.e. the water circulating...
- baglartimus
- Thread
- Jan 7, 2010
- air boiler central heating system cylinder expansion gas gas boiler gravity high hot hot water hot water cylinder indirect inside loft motorised valve pipe pipes problem pump radiators regulations tank valve warm water
- Replies: 1
- Forum: Plumbing Jobs | The Job-board
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Circulating problem

Sime Oil fired boiler, probably sealed system. Industrial unit, not home. Boiler reaching temperature but nothing to rads. Pressure low but filling loop making no difference. (Have seen this before and we call it an Irish solution to an Irish problem, i.e. it has all the equipment for a sealed...
- BoilerPro
- Thread
- Jan 6, 2010
- air bleed boiler circulating filling loop guage motorised valve oil pressure problem pump refill sealed sime system tap temperature valve valves water
- Replies: 2
- Forum: Plumbing Jobs | The Job-board
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Central heating in need of some professional TLC

Hi to everyone. My central heating system is an 8mm microbore system, over 17 years old,with 11 radiators attached. Quite recently I noticed that occasionally the heating does not come on when the temperature drops. The thermostat clicks in, the boiler clicks as though it is about to fire up...
- mikemycrfot
- Thread
- Dec 30, 2009
- air bleed boiler central central heating system flush gas head motorised valve noise plumber potterton power problem professional pump radiators sludge valve valves water work
- Replies: 4
- Forum: Plumbing Jobs | The Job-board
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Indirect Solar System Q?

Hi Can anyone help me understand how to do the following - I want to pick up the hot water feed from the boiler (in garage) and route it through the spare currently unused coil in my cylinder, then once the hot water has passed through the coil return it on it's journey to the rads. I...
- cozy
- Thread
- Dec 17, 2009
- boiler building building regs central heating system control copper cylinder hot hot water indirect motorised valve motorised valves pipe pipes problem radiators solar solar heating system tee thermal timer valve valves water wireless y plan
- Replies: 16
- Forum: Plumbing Jobs | The Job-board
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Y plan motorised valve problem

Hi folks ,The problem i have is that when the programmed time as elasped the (honeywell mid postion valve) stays in its last postion ,this causes it to get hot over night and i read somewhere that this isen`t good for them as over time it causes them to burn out .I have checked and double...
- steveboy
- Thread
- Dec 7, 2009
- boiler cable central heating system connections cylinder dhw drayton hot installation mains motorised motorised valve plumbing power problem pump supply system valve valves winter wireless y plan yellow
- Replies: 12
- Forum: Plumbing Jobs | The Job-board
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Potterton Profile 80E

I've got a Potterton Profile 80E about 10 years old. All working ok. All the rads have trv's and there is a Honeywell CH/HW timeclock for on/off operation. I want to fit a roomstat as well. Where do I connect this to on the boiler? Any info would be appreciated. Thanks, Gerry
- Lloyds
- Thread
- Dec 4, 2009
- air boiler central heating system cold google hot job motorised valve motorised valves potterton power profile pump radiator supply switch trade trv valve valves wall water web wireless
- Replies: 10
- Forum: Plumbing Jobs | The Job-board
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Underfloor heating zone query

Hi, We have just had underfloor heating installed in our extension. It connects directly to Boiler via manifold. Problem is when UFH comes on (via it's own Timer/program) all of our CH rads come on i.e. it overrides our CH Program/timer. So UFH and CH are not working independently and CH just...
- chassy
- Thread
- Dec 3, 2009
- air boiler central heating system fitting flow forum heating hot hot water megaflow motorised valve motorised valves pipe plumbing problem query supply timer ufh under floor heating underfloor underfloor heating valve valves water wireless y plan zone
- Replies: 8
- Forum: Plumbing Zone
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Worcesters in Tandem

I have just installed a boiler sequencing control for my twin Worcesters connected in tandem. Oddly, I have discovered that when the RH boiler is the only one firing, hot water does not circulate; but when the LH boiler is the only one firing, water circulation is OK. When both are firing...
- TonyP
- Thread
- Nov 16, 2009
- boiler boilers branch central central heating system circulation control dhw flow hot hot water motorised valve pipes plumbing problem pump save money system valve valves water worcester worcesters work
- Replies: 2
- Forum: Plumbing Jobs | The Job-board
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Honeywell 3 Way Motorised Valve

Advice please. I have a Honeywell 3 way valve 40003916 -003., which when CH & HW are called for at the same time, from the programmer, Only HW will kick in. Once the water has reached its required temperature, the Heating will come on. Individually, CH & HW works O.K. Can anyone offer any...
- Jim Cooper
- Thread
- Nov 15, 2009
- connections electric heating honeywell hot motorised motorised valve temperature valve valves water work
- Replies: 2
- Forum: Plumbing Jobs | The Job-board
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Honeywell 3 Way Motorised Valve.

Advice please. I have a Honeywell 3 way valve 40003916 -003., which when CH & HW are demanded for at the same time, from the programmer, Only HW will kick in. Once the water has reached its required temperature, the Heating will come on. Individually, CH & HW works O.K. Can anyone offer...
- Jim Cooper
- Thread
- Nov 13, 2009
- connections electric heating honeywell hot hot water motorised motorised valve temperature test valve water work
- Replies: 2
- Forum: Plumbing Jobs | The Job-board
R
Actuator problem which replacement?

Hi there, I have a problem with the actuator on a 3 port motorised valve in our system. 2 years ago a plumber installed a Salus MV322 - 3 Port Motorised Valve in 22mm. 1 year on when the system clicked from hot water to heating, it made an awful noise. Clunk! even waking the kids when it...
- r1cbm
- Thread
- Nov 13, 2009
- 22mm actuator cheap cold heating hot hot water motorised valve noise noisy plumber problem replacement system valve water which
- Replies: 0
- Forum: Plumbing Jobs | The Job-board
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Syncron motors

My Syncron motor stays powered up even when the central heating is switched off at the timer, hot water off as well. Is this a timer fault i have a siemens RWB9 if you turn the main power off at the boiler it shuts everything down and the motorised valve returns back to hotwater setting ...
- wat5190
- Thread
- Nov 8, 2009
- boiler central central heating system cylinder hot hot water hotwater motorised valve power replacement supply switch timer valve valves water work
- Replies: 8
- Forum: Plumbing Jobs | The Job-board
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Help Help Help

Once a motorised valve has powered up and moved the valve from hot water to central heating should the motor stop running and lock in position bare in mind the spring tension against it, or should it carry on running to keep the spring tension valve in the correct postition. Why would power stay...
- wat5190
- Thread
- Nov 5, 2009
- central central heating heating help hot hot water motorised valve valve valves water
- Replies: 3
- Forum: Plumbing Jobs | The Job-board
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motorised valves help

Once a motorised valve has powered up and moved the valve from hot water to central heating should the motor stop running and lock in position bare in mind the spring tension against it, or should it carry on running to keep the spring tension valve in the correct postition. Any help would be...
- wat5190
- Thread
- Nov 5, 2009
- central central heating combi confused diverter valve electronic fitting fix google head heating help hot hot water hotwater manual motorised motorised valve motorised valves power test valve valves water
- Replies: 9
- Forum: Plumbing Jobs | The Job-board
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Room Thermostat Problem....Any Ideas???

Hi! I hope you make be able to help me with a problem with the central heating in a house that we moved into a few months ago. This problem has only just come to my attention, and I believe that it has been like this since we moved in. The problem is that the Room Thermostat will enable...
- retrosimon
- Thread
- Nov 3, 2009
- baxi boiler central central heating system combi combination hot hot water ideas internet motorised valve pipes power problem radiators supply system temperature thermostat timer trade valve water
- Replies: 8
- Forum: Plumbing Jobs | The Job-board
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diverter valve actuator/stepper motor not moving

I have a heatline c24 condensing boiler diverter valve actuator/stepper motor is not moving. The central heating and hot water work correctly if i operate the diverter valve manually. Continuity of the 3 lead actuator/stepper motor power cable is ok. Actuator/stepper motor has been replaced. I...
- stevep
- Thread
- Nov 1, 2009
- boiler cable central central heating system condensing diverter diverter valve hot hot water motor motorised valve moving power valve water work
- Replies: 1
- Forum: Plumbing Jobs | The Job-board
S
Wives tale water and central both on

Just a query, do you have to have the hot water switched on when you have the central heating on, or is it ok just to have one or the other on?
- sawhead
- Thread
- Oct 23, 2009
- bath central central heating circulation cylinder heating hot hot water hot water cylinder motorised valve radiator radiators rayburn system valve water
- Replies: 4
- Forum: Plumbing Jobs | The Job-board
S
Honeywell Motorised valves

Has anyone got a testing procedure to diagnose faults on Honeywell 2port/3port motorised valves or any shortcut tips??/
- Steveo0189
- Thread
- Oct 22, 2009
- boiler central heating system cylinder fitting guide honeywell hot hot water motorised motorised valve motorised valves power problem register supply switch test tips valve valves water website
- Replies: 7
- Forum: Plumbing Jobs | The Job-board
S
wiring diagram

was trying to explain the way a three way valve works and i realised ive actually dont know exactly has anyone got a internal wiring diagram of a honeywell three way ?
- stevetheplumber
- Thread
- Oct 21, 2009
- boiler bosch central heating system dhw diagram eco merchants motorised valve travel valve van wiring worcester
- Replies: 9
- Forum: Plumbing Jobs | The Job-board