Caravan water heaters come in many various shapes and sizes. You can purchase these in many retail shops who supply parts for your RV and you should choose the size and shape depending upon the area where you will install it.
The hose that leads to the water pump area is the return.
Please see link below.
To check the water heater pilot light, locate the access panel on the water heater and look for a small flame. If the flame is out, follow the manufacturer's instructions to relight it safely.
There are several signs that can indicate your water heater is failing. Look out for rusty water, strange noises, leaks, or inconsistent water temperature. If you notice any of these signs, it may be time to have your water heater inspected or replaced.
There are several signs that can indicate a bad water heater. Look for leaks, strange noises, rusty water, or a lack of hot water. If you notice any of these issues, it may be time to have your water heater inspected or replaced.
This depends if it is a high or semi pressure system, as well as if it might be a gravity fed or an "on demand" type water heater.
a spring loaded
Need more info here. Not sure what a heater pump is.
To determine if your water heater is bad, look for signs such as insufficient hot water, strange noises, leaks, or rusty water. Additionally, check the age of the water heater and consider having a professional inspection if you suspect any issues.
There are a few signs that your water heater may be going bad. Look out for leaks, strange noises, rusty water, or a decrease in hot water supply. If you notice any of these signs, it may be time to have your water heater inspected or replaced.
The heater core resembles a small radiator.
If you're using a gas water heater, the first thing you should check is the pilot light. If you're using an electric heater, check the heating elements to make sure they're intact and working correctly. Check to see if water is leaking around the base of the heater, and check for low rumbling noises or high-pitched squealing. Also, if your water is rust-colored or smells like rotten eggs, it is a water heater problem.