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Why do all the water pipes knock on opening on aqua ax 205

The knock does not happen when the cold water supply to the hot water boiler is shut off.

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  • Expert
  • 182 Answers

You may need an expansion tank.

Posted on Nov 09, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

kma836
  • 7 Answers

SOURCE: boiler overheating

the problem there a relay stuck or thermostat bring on the pump & you can lower your high limit aquastat!! also the flow valves can bypass hot hot water risers time to put in a seperate water heater domestic coil are not energy efficient !!!! aquastat high limit set @ 180f deg low limit set @ 140f deg!!!
good luck!!! tim

Posted on Oct 18, 2008

  • 104 Answers

SOURCE: Combi Boiler - Running warm & then cold!? HELP!

mixing valve must be replaced

Posted on Nov 02, 2008

gasman44
  • 83 Answers

SOURCE: my thermostatic concealed shower valve only gives

Hi,

If the hot and cold are fitted the wrong way round then the thermostat on the shower unit cannot operate properly!

Most thermostatic mixer showers have a 'bi-metallic' thermostat, if you supply the hot to the cold and vice versa IT WILL NOT WORK.

It is like wearing the left shoe on the right foot and the right on the left! It doesn't work.

Re-install the hot and cold to the correct supply, and this will sort it.

I hope this helps.

Posted on Jul 08, 2009

  • 1 Answer

SOURCE: Combi Boiler - Hot water pressure low

I have a 1 bed flat, above an old pub. I have a combi boiler but my water pressure is ridiculous. The shower water runns down the shower head. I'v been told that the cold water feed to the building is split to two boilers, one to the pub and one to me. Im thinking of installing a shower pump in between the boiler and the shower. will this work as my friend says he has done this and it sorted his problem out. I'v looked it up on the net and everything says this does not work. Help please.....

Posted on Dec 24, 2009

  • 1 Answer

SOURCE: My boiler is not working, not heat, no hot water,

your condensation pipe may be frozen get a hairdryer on it or a hot kettle that should sort it thats the whit pipe on the left usualy plastic

Posted on Jan 09, 2010

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2 Answers

My hot water just stopped running from hot side but cold still runs all sinks so what happen


the is a tube inside the heater that sometimes fails . and all you get is cold water call a local plumber and have them check the DIP tube

Jun 17, 2015 | Rheem Richmond 40 Gal Nat Gas 6 Year Power...

1 Answer

Why does it take two bowls of water before water gets hot on combi boiler


The water isn't maintained hot (unless the central heating is on) in a combi boiler. you will, therefore have to turn the water on, which activates the burner. The burner will then have to heat up the heat-exchanger which then supplies the hot water through cold pipes. Once the pipes are warm, you will receive hot water.

Jan 29, 2015 | Water Water Heaters

1 Answer

Crown boiler


follow this chart troubleshooting and fix it. God bless you
est and replace a high-limit cutoff:
  1. Disconnect power to the heater at the electrical panel and post a sign warning others not to turn it on.
  2. Remove the upper access panel and push the reset button.
  3. Replace the access panel and turn the power back on. If the water is hot, the reset was the problem. If not, you'll need to turn the power off again and reopen the access panel.
  4. Use a multimeter to test the cutoff terminals for continuity. If faulty, replace with an exact replacement part.
Drain a tank:
  1. Shut off power at the electrical panel and post a sign warning others not to turn it on.
  2. Close the cold-water supply valve and open a hot-water faucet somewhere in the house (to speed draining).
  3. Attach a garden hose to the drain valve and run it outside the house.
  4. Open the drain valve and allow all water to drain out.
  5. To refill the tank, close the drain valve tightly and open the cold-water supply valve. Also open a nearby hot-water faucet. When a steady stream of water flows from that faucet, the tank is full and the faucet can be closed.
  6. Once the tank is full, turn the electrical power back on.
Test and replace a relief valve:
  1. Lift the spring lever on the valve to fill a small cup. Check the cup for sediment.
  2. If no water spurts out, or if water continues to drip after the valve is released, replace the valve.
  3. Cut power at the electrical panel and post a sign warning others not to turn it on. Close the cold-water supply valve.
  4. Drain a few gallons of water from the tank.
  5. Unscrew and remove the discharge pipe if used.
  6. Loosen the relief valve with a pipe wrench, then remove the valve by hand.
  7. Apply pipe tape to the threads of the replacement valve and screw it into the tank by hand. Tighten it with a pipe wrench. Screw the discharge pipe (if any) into the valve outlet.
  8. Refill the water heater and restore electrical power.
Replace a drain valve:
  1. Shut off power at the electrical panel and post a sign warning others not to turn it on.
  2. Close the cold-water supply valve and drain the water heater completely (see above).
  3. Unscrew the drain valve with a pipe wrench.
  4. Replace the drain valve with an identical unit wrapping the end with pipe tape.
  5. Refill the tank and restore electricity.

Oct 14, 2013 | Water Heaters

1 Answer

Changing hot tap washer


Hi, if you have a mains pressure HWC, all you need to do is shut the cold mains off either from your cylinder cupboard or on the street. Shutting it off on the street is probably better as things like shower valves tend to pass water through and start a back feed.

Sep 20, 2013 | Water Heaters

1 Answer

Which is cold water connection on the boiler


Incoming cold water usually connects to nipple marked with C, and/or the nipple that feeds into water filter (if unit has built in filter)
If unit has shut-off valve, then shut off is located on cold line.
If unit is operable, then turn on hot water and see which pipe gets hot ... and then cold is other pipe.
read your product manual.
Search your brand and model on internet to locate product manual.
Otherwise re-post question and include brand and model number so product manual can be located and information can seen first-hand.
Gene

Jul 18, 2013 | Water Heaters

1 Answer

Wickes 102 combi boiler constantly loosing water pressure


It sounds like your thermostat could be the problem. Have you noticed the boiler cutting off at all, or does it run continuously until it goes out on low water?

You stated, "when boiler is on", so I am wondering how you get the boiler on. If your boiler is controlled by a thermostat, you need to check it for a cold draft possibly from behind the thermostat in the wall where the wires come through. The thermostat should never be on an outside wall. The thermostat could be defective.

An aquastat can also control your boiler. If you have an aquastat, check the setting, typically 175 - 180 degrees. You should also have a "high limit" which should be set at 210 - 220. Some people run that high side limit higher; not a good idea - defeats the purpose. If the aquastat is set too high, the boiler will operate too hot and the problem you have will occur.

"pressure rises and pressure relief valve opens" This could mean that your pressure switch is prematurely venting. Check boiler temperature to see exactly at what temperature the T&P valve purges. If it blows off below the high side setting, either adjust or replace. The T&P valves are usually not adjustable. That blow off temperature is stamped on the head of the valve. So, if it discharges too soon, replace it.

Have you actually seen evidence thgat the T&P valve is opening? You may have a bad bladder in your expansion tank and your system may have air in it. Your boiler should have 12 psi when cold and 20 - 22 psi when operating. Check your boiler pressure guage.

"
this eventually drops below the minimum operating pressure" Technically, there is set point for a NO MINIMUM OPERATING PRESSURE. That is a function of the amount of water in the boiler. If the T&P is blowing off, it will vent water from the boiler and the boiler pressure will go down. There is a minimum operating TEMPERATURE.

Your boiler could be low on water. You will have to manually fill the boiler. Be careful of thermal shock to the boiler. Feel the piping, and fill only when the circulator is running. Make sure the water is not going directly into the boiler. The supply water should go into the circulating supply side which feeds the radiators, radiant floor, or base board circuits.

All this will adversely affect your hot water. The heat exchanger for the potable hot water may have scale build up in it. Using the hot water keeps the boiler running, and a scaled heat exchanger will give you cooler hot water and the boiler keeps running. If this is a problem, you will need to replace the heat exchanger. A better idea is to not use the boiler for your domestic hot water. Why run the boiler in the summer?

Feb 02, 2013 | Water Heaters

1 Answer

Code 13 help... Everytime I go to use the shower (a mixing system of hot and cold) Code 13-- Code 12 the system shuts down. If I just use hot or cold I am fine-- Any one?


if cold supply to boiler and shower are off the same feed this could be your problem as the boiler governs flow of hot water best of luck

Oct 20, 2009 | Rheem EcoSense by 4.2 GPM Tankless Water...

2 Answers

Alpha 240e boiler wont fire up for hot water, will for heating


most likely the diverter valve.. when hot tap turned on the movement of the water through the valve operates a diaphragm which pushes a pin/button//switch to tell the boiler to fire up

Aug 21, 2009 | Water Heaters

1 Answer

A trickle of hot water from taps, central heating ok


it sounds like your shut off valve might be bad even though it turns on and off by turing it doesn't mean that the washer is not stuck to the seat and not opening, try replacing the valve

May 18, 2009 | Water Heaters

2 Answers

Combi Boiler - Hot water pressure low


the coil inside got clogged

Dec 22, 2008 | Water Heaters

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