Sea Dog

Dean, whichever way you connect it, make the lines at sufficient length to swap if you've got it wrong. My tank was connected wrongly and reverse siphoning made the tank go cold overnight. I had to make big pipework changes to reverse the thermal flow, but it fixed it and I now have hot water in the mornings. I also extended both lines to go down to base level from the coil first before rising to the lines back to the engine room. Hope that helps.

It always seemed to me that, when someone posted questions such as this on this forum, knowledgeable folks with experience in the subject would be along pretty soon to achieve a reasonable collection of sound advice. Lately we seem to have a preponderance of wild-ass guesses, interspersed by the odd sage comment. I can't help the OP on this subject as it's quite specialist, but I would be interested to read constructive comment that helps him to solve his problem. We have some really helpful folk here with an amazing range of knowledge and experience - perhaps we could make a little space for them?

Well, if the word submarine was being used as an adjective you'd be right. However, as it's being used as a noun here, you'd be at odds with all the navies in the world. My money is on them. Edited to add the wink so you know I'm not really having a pop!

Rather more like tiddling in a wetsuit: welcome but shortlived relief.

What?! Really?! No wonder the canals are empty!

There's a few as I'm sure you'll hear shortly, but Wilson of Kinver definitely do a Narrowboat sized one.

Do remember to send these prices and locations to diesel@drapers3.Plus dot com so that Bob can put them on his really useful spreadsheet and everyone can see them.

I think this is a spoof. Noone in England dresses like that - he's clearly wearing some form of technical fabric lederhosen and is about to play that organic alpine horn thingy.

Sometimes this forum is just brilliant. What helpful responses! Don't forget to give them a greenie, OP.

Maybe he could fetch you a pizza whilst he's running errands for you?

Well, by way of a higher end parameter for your ball park, my Beta 43 set up takes 32ltr cnc skin tank and calorifier. The engine capacity is relatively small - the skin tank on the other hand....! I think most here would advise that you pre-mix your coolant to avoid potential locks in the flow.

Or perhaps built by a reputable builder (by - oops) BUT now upside down? The surface mounted propeller would be the give away. Edited, obviously.

A lock nut is a nut which locks another nut by preventing it from unscrewing and therefore loosening. It does this by being tightened on top of the original nut once it has been adjusted correctly. So, you adjust the first nut so that your mounts are correctly adjusted, keep that nut exactly where it is with a spanner to stop it turning whilst you tighten the lock nut onto it. Normally you would use two nuts with one acting as a locknut or a nyloc, which is designed to lock itself. A nyloc could be used as a locknut too, but normally isn't. Nylocs ought to have just 2 threads on show once tightened for maximum effectiveness, but this is frequently not the case.

Fair point. Perhaps CRT ought to charge licence fees based on time the boat spends away from a marina or similar home mooring, then those who use their waters (pardon the pun) most, contribute most? Now, where did I leave my coat?

Interesting to hear that, and it's therefore reasonable that they should charge something unless you're a customer of some sort. Someone said earlier they'd never had to fill at a marina. I'm the same - except for Crick and Droitwich where my boat was based so water came with the turf. As I said, and we do many weeks at a time, I've never needed water desperately enough to find myself with no choice but to resort to paying. Others with smaller tanks may have a different experience, but that's mine.

Well as an example mine's 100 gallons. I'm never urgently seeking a water point as it were. I usually check the gauge and think I'll top that up when it's convenient over the next few days.

Did he get through the night or should we send the divers down?

Shame on you! Call it Fido for now and maybe someone will come up with something better if you can't.