Ask The Expert
The Questions
Q: Can we install a tundish and route through a water free tap to relieve the pressure and temperature of a boiler PRV?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: My gravity hot water system doesn't produce hot water. I've checked and cleaned out the header tank and checked that the vent pipe is okay. Have you got any suggestions?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: Can you tell me why the maximum distance for the D1 pipe in Building Regulations G3 is 600mm?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: My Baxi 105e fires up fully, then after two seconds, the flame reduces and dies completely, any ideas what could be wrong?
A: Heateam Technical Office
Q: I’m installing a heat store system heated by a Worcester Bosch Greenstar 15i with underfloor heating from the store. The store needs to be at a temperature high enough to heat the tap water. Will weather compensation be advantageous with this arrangement?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: Is it acceptable for discharge pipes from the expansion relief/pressure and temperature relief from an unvented domestic hot water system to discharge against a wall in the way a PRV valve from a sealed system can?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: There is no question that the plumbing and heating industry was affected during the recession. Where do you think the market is heading now?
A: Kelvin Stevens, managing director of PTS
Q: I’ve got a Baxi 105e, the pressure when the boiler is off is at 0 but when I turn the boiler on, it moves to a normal operating pressure. Can you help?
A: Lee Carruthers, technical officer at heateam - the service division of Baxi Group
Q: When calculating heat demands for rooms, the default air temperature for a hall is 18ºC. This is the room where we normally site the thermostat with no TRV fitted to the radiator. Should the room thermostat be set to 18ºC or 21ºC?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: Why do radiators get hot at the top and cold at the bottom?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: I've got a non condensing boiler. The flow temperature is 65-70ºC and the return is 55-60ºC. What advantage would I get from fitting a condensing boiler? Will it be condensing at these temperatures?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: What is the calculation to find the amount of water produced per kW in a condensing boiler flue? Is it 0.15 x kW?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: I'm considering underfloor heating underneath a wooden floor in the living room of my Victorian house. The ceiling is three metres high. My questions are:
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: Can a heating system safety discharge pipe terminate in to an internal drain, provided it has a tundish within 500mm of the safety valve?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: The pilot light on my Worcester R 29 / R 40 HE conventional condensing boiler has gone off and I can't get any central heating. Can you give me some advice on how to get it working?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: Can the discharge from a tundish servicing an unvented cylinder run into an internal soil stack?
A: Martyn Bridges, director of marketing and technical support at Worcester, Bosch Group
Q: Can underfloor heating (UFH) be connected to an existing sealed radiator type heating system?
A: Martyn Bridges, Director of Marketing and Technical Support at Worcester, Bosch Group
Q: With cistern style water heaters, we need blending valves that work at less than one metre head with higher cold pressures. Do you know of any?
A: Martyn Bridges, Director of Marketing and Technical Support at Worcester, Bosch Group
Q: Is it acceptable for rainwater 'run off' from an MRF waste site incorporating an anaerobic digester to be discharged into a highways drainage system and then onto local water courses and land?
A: Steve Harris - Technical Services Engineer at Wavin
Q: When installing a 30kW log burner what flue parts should be used?
A: Robert Burke - Technical and Standards Manager at HETAS
Q: Can a soil stack be vented from a horizontal branch where a WC pan exits the house?
A: Steve Harris - Technical Services Engineer at Wavin
Q: Has there been a change in the flexible SS flue liners for solid fuelled appliances procedure?
A: Martyn Bridges, Director of Marketing and Technical Support at Worcester, Bosch Group
Q: What is the best method of installing an air source heat pump into a system to heat the underfloor heating (UFH)?
A: Martyn Bridges, Director of Marketing and Technical Support at Worcester, Bosch Group
Q: I need to replace part of an old clay land drain in my garden. I'm sure it would have been produced in imperial measurements. What size will I need to buy to match today's products?
A: Steve Harris - Technical Services Engineer at Wavin
Q: In the Benchmark log book for domestic gas boilers, it asks for the differential temperature of the flow and return pipes. When should these readings be taken?
A: Martyn Bridges, Director of Marketing and Technical Support at Worcester, Bosch Group
Q: Building Regulations G3 - does this affect a like for like bathroom replacement in a domestic property and if so, when did it come into force?
A: Steve Harris - Technical Services Engineer at Wavin
Q: Is it compulsory to fit a sampling chamber to the outlet of a new septic tank?
A: Chris Hagain, technical support engineer at Wavin (on behalf of Steve Harris):
Q: What type of pump should be used in a 300 litre unvented hot water cylinder?
A: Martyn Bridges, Director of Marketing and Technical Support at Worcester, Bosch Group
Q: Why is it wrong to put a TRV in the same room as the room thermostat?
A: Martyn Bridges, Director of Marketing and Technical Support at Worcester, Bosch Group
Q: When installing an air source heat pump outside a building, are there any advantages to installing this on the sunny side of the building or even inside a small greenhouse in order to take advantage of the warmer air in these two locations?
A: Dave Lacey, commercial director in the UK and Ireland for Vaillant
Q: What is the minimum recommended size for a cold water storage tank?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
Q: Can I incorporate a multi-fuel stove with an unvented hot water storage system via a vented coil?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
Q: Do the changes in Part G of the Building Regulations require any changes to cold water storage cistern specifications when the cistern is supplying a vented hot water tank with immersion heaters?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
Q: Problematic gate valves
A: Steve Harris - Technical Services Engineer at Wavin
Q: What benefit will the boiler scrappage scheme have for installers?
A: Kelvin Stevens - Managing Director of PTS
Q: What should installers be doing to strengthen their offering in the credit crunch?
A: Kelvin Stevens - Managing Director of PTS
Q: How should my local merchant be helping me with the upcoming Part G legislation?
A: Kelvin Stevens - Managing Director of PTS
Q: Are there many non unvented systems on the market? And why aren't they used more?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
Q: Why complicate the fixture and fittings issue with an in-roof kit that is more expensive, takes longer to fit and is less pleasing on the eye?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
Q: What taxable relief is available for work to clear a dump site for building?
A: Graham Booth - Senior Accountant at Easy Accountancy
Q: What happens if a domestic cylinder is supplied from a cold water cistern as in-direct cold?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
Q: Tax relief when purchasing new equipment
A: Graham Booth - Senior Accountant at Easy Accountancy
Q: Can a copper cylinder be positioned on its side in the loft under a cold water storage tank?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
Q: Should TRVs go on the flow or return pipe when fitting to radiators?
A: Steve Harris - Technical Services Engineer at Wavin
Q: Want to know how to remove old toilet pans?
A: Steve Harris - Technical Services Engineer at Wavin
Q: What lies beneath?
A: Martyn Bridges - Director of Marketing & Technical Support at Worcester, Bosch Group
The Experts
