Warm Showers, Less Fuss: Mixer Valves That Just Work

New year, new shower. If your morning rinse has turned into a guessing game, this is for you. Here is a quick, clear guide to V100 vs V200 mixers, how thermostatic control keeps temps steady, how long a cartridge should last. Plus a simple troubleshooting checklist, straight talk on DIY vs pro fitting, and safety notes for LPG setups. Ready for warm showers with less faff? Let’s go.

V100 vs V200: what is the difference, and which should you pick?

Both the V100 and V200 are compact thermostatic mixers built for static caravans. Both aim for one thing, steady temperature without the jumpy hot and cold.

V100: a trusted classic for many UK static caravans. Designed to be fitted vertically only. If your current valve has 45 mm centres and a vertical body, the V100 often drops straight in. It pairs well with typical caravan flows and pressures. If you want reliable thermostatic control at a fair price, the V100 is a safe bet. See the v100 vertical thermostatic shower mixer valve 45mm centres for specs and sizing guidance.

V200: newer feel, smooth operation, and often a touch more refined control. If you are replacing like for like on a later model caravan or upgrading for nicer ergonomics, the V200 can be the right pick. It also runs with 45 mm centres, so the install can be straightforward. If you want to compare both in one place, the v200 shower mixer listing shows compatibility and stock. The V200 can be fitted both horizontally and vertically.

Whichever you choose, thermostatic control is the real hero. It blends hot and cold water to a set temperature, then keeps it there while pressures change. Someone flushes the loo, the boiler cycles, the wind picks up and your LPG heater modulates, your shower temperature should hold steady. Good thermostatic valves also include scald protection, limiting maximum output unless you press a safety override.

How long should a shower mixer cartridge last?

In normal use, a quality thermostatic cartridge often lasts 5 to 10 years. The range is wide, because water quality, usage, and winter storage matter. Hard water and limescale can shorten life. Leaving the valve unused for months can gum up the mechanism if the water dries and leaves deposits. Regularly turning the temperature dial through its range keeps internals moving and helps longevity.

How do you know if your shower mixer valve is bad?

Look for these signs:

  • Temperature hunts or drifts, even when your LPG heater or boiler is steady
  • Lukewarm only, no matter how you turn the dial. Sudden hot spikes or cold shocks.
  • Stiff temperature control, or the knob binds.
  • Visible drips from the valve body or at the controls.
  • You hear the heater firing but the shower stays tepid, pointing to poor mixing.

If you tick one or more, start with the quick checks below. If the basics pass, the cartridge is likely the culprit.

Quick troubleshooting checklist

  • Check your hot water source: is the LPG heater firing consistently, or is the boiler showing a fault light? Reset if safe and per the manual.
  • Confirm inlet filters: many caravan mixers have small mesh filters on the hot and cold inlets. Clean them carefully.
  • Inspect the shower hose and head: a clogged head restricts flow and confuses thermostatic control. A simple replacement like our shower hose chrome makes a big difference.
  • Try other taps: if your kitchen tap runs hot and stable, the issue is local to the shower.
  • Descale gently: a soak of the shower head and visible parts in a mild descaler helps free sticky parts. Keep chemicals away from cartridge internals unless the manufacturer says it is safe.

Can you fit a mixer shower yourself?

You can handle simple like for like swaps if you are confident with basic plumbing, can isolate water, and have the right tools. Use PTFE tape where specified, check olives and compression nuts, and pressure test before you refit the trim. Always follow the installation leaflet.

Important, anything involving gas must be done by a qualified professional. If your job touches the LPG water heater, flue, or gas pipework, bring in a Gas Safe engineer with LPG caravan scope.

Not sure? A pro can swap a V100 or V200 quickly, set the max temperature, and check for leaks. It is often worth it.

Safety notes for LPG water systems

  • Ventilation matters. Keep vents clear and never block a flue.
  • Service your LPG water heater annually. If you need a replacement, we stock lpg water heater options designed for caravans, with fast delivery on in stock units.
  • If you smell gas or see sooting at the flue, stop, ventilate, and call a pro.
  • Winterise. Drain down and use non toxic antifreeze where appropriate in traps, and open taps to prevent freeze damage. 
  • If you have a combi boiler, ensure it has the correct amount of central heating antifreeze and inhibitor,

Simple care to extend cartridge life

  • Turn the temperature control through its full range monthly.
  • Rinse limescale from the shower head regularly.
  • Fit a small inline scale reducer if you are in a hard water area.
  • Do not force a stiff control. Investigate and descale first.

Ready to upgrade?

If your mornings are turning into a thermostat battle, a fresh V100 or V200 is a game changer. We hold strong stock when many suppliers are thin, with fast dispatch and helpful advice by phone or email. Browse both models under v200 shower mixer and v100 shower valve, then choose the fit that suits your caravan. If you are unsure about compatibility, call 01284 277159 and our team will help you match centres, trims, and connections.

Summary

Thermostatic mixers keep your shower steady, safe, and stress free. Expect 5 to 10 years from a good cartridge, longer with light scale and regular care. If temperatures wander or controls go stiff, start with simple checks. A full upgrade to V100 or V200 makes sense if the body is tired or you want a clean refresh. DIY is fine for basic like for like plumbing, but anything gas related needs a qualified pro. Sort it now while stock is strong and delivery is quick, and enjoy warm showers with less fuss all year.