Triton Madrid 2 Shower Problems

A vented hot water cylinder is an integral part of many domestic hot water (DHW) systems, especially in the UK. The system operates with a cold water storage tank, usually located in the loft, that feeds the hot water cylinder, which then provides hot water to the taps. However, like all systems, issues can arise. Here’s a dive into one such problem and potential solutions.

The Problem:

• Symptoms:
  • DHW system started delivering only lukewarm water over the past few days.
  • Previously, the system used to provide very hot water.
  • When using an electrical immersion heater, the water heats up adequately.
  • Suspected causes include a possible airlock or the introduction of air through a minor leak.

Understanding the System:

1. Coil: The cylinder uses a coil to heat water. Cold water from the loft tank enters the bottom of the cylinder, and hot water exits from the top.
2. Electrical Immersion Heater: This is an alternative heating method. The heater directly warms the water since it’s fitted inside the tank. An airlock affecting the coil heating doesn’t influence the electrical immersion heater.

Potential Causes and Solutions:

1. Airlock: An airlock in the hot water system can restrict the flow of water, causing it to become lukewarm.
   • Solution: Identify the heating coil on the cylinder. The top connection of this coil might have an air release. You can release this air, either from a bleed point similar to a radiator or from a flat cap. Once air is released, water should start flowing. If only water comes out without any trapped air, the issue might be elsewhere.
2. Auto Air Vent Malfunction: The auto air vent is designed to expel air when it builds up. If this component is jammed or faulty, it can prevent proper water circulation.
   • Solution: Instead of tampering with the top part of the air vent, which can lead to leakage, it’s advised to carefully loosen the coupling where the pipe connects to it. Releasing it slightly can allow trapped air to escape. If this is a recurring problem, consider replacing the auto vent with a quality brass-bodied version.
3. Valve Issue: There might be a problem with the mid-position valve or the cylinder stat might be set too low.
   • Solution:
     • Check the cylinder stat. Ensure it’s set to around 55-60°C.
     • Observe the pipes when the hot water is switched on. If the central heating (CH) side gets hotter than the water side, the valve might be faulty. A potential indication of a valve issue is if the boiler switches off too soon when only the hot water is on.
4. Leak on the Flange: A leak on the flange upstream of the pump might introduce air into the system or cause other issues.
   • Solution: It’s crucial to address and fix any leaks promptly. Even small drips can introduce air into the system or lead to more significant problems over time.

Final Thoughts:

If you’re considering replacing your entire system, you might be looking at combi boilers. Combi boilers directly heat water from the mains when a tap is turned on. Storage combi boilers have an integrated hot water storage tank, which means they can provide more hot water in one go compared to standard combi boilers.

While storage combis can be more efficient and provide hot water at a higher flow rate, they’re larger and might require more space. On the other hand, standard combi boilers are compact but might struggle to provide high flow rates for larger homes. Your decision should be based on your household’s hot water demands, available space, and budget.

In conclusion, it’s essential to regularly maintain and check the components of your DHW system. When in doubt, always seek advice from a professional.