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Old 02-04-2010, 03:40 AM   #1
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Unhappy 345 mo safety valve flexible hoses and fittings

I have an 86, 345 mo over the pond here in the UK. I know the 80% safety valve is shot and the unit has propane to the motor as well for better fuel economy. the flexible lines to both the main carriage and the motor don't look too clever, so I guess as i've discovered with the air ride, are all fittings are NPT ? ( we have BSP here ) so where can I get the valve and lines from ? ( USA or the UK )

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Old 02-04-2010, 06:01 AM   #2
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NPT fittings are readily available here in the USA. You should be able to order them online from any of the big box supply stores such as Home Depot. I don't know if they have any stores there in the UK. If they do, you may be able to order through the store and save on the shipping costs.
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Old 02-04-2010, 10:25 AM   #3
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Thanks Aviator, I will have to look at home depot as we don't have them here in the UK. any ideas on the saftey valve ?

regards, Paul.
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Old 02-04-2010, 12:01 PM   #4
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No. To be honest, I am not sure what the 80% valve is. However, with everything else imaginable for sale on the internet, that is where I would start looking. It looks like Focus in the UK is similar to Home Depot here in the US. Home at Focus
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Old 02-04-2010, 12:12 PM   #5
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You can get U.S. size fittings at the U.S. amazon.com web site (but not at amazon.co.uk).

Also, I don't think there is an OPD (80%) float valve for that tank. It would only have the "spitter" valve to warn of overfilling.
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Old 02-04-2010, 06:43 PM   #6
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Do keep in mind that all propane line fittings prior to regulator must be capable of handling 300 psi (20 atm.). Regular US pipe fittings are rated for a bit less than half that.

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Old 02-04-2010, 08:44 PM   #7
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Quote:
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Do keep in mind that all propane line fittings prior to regulator must be capable of handling 300 psi (20 atm.). Regular US pipe fittings are rated for a bit less than half that.

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Really?

Besides, the flexible lines and the carb should be downstream of the regulator.
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Old 02-04-2010, 11:34 PM   #8
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Really?
Besides, the flexible lines and the carb should be downstream of the regulator.
I don't know how the plumbing is set up in this application, but normal US steel pipe fittings are rated at 125 psi; they're generally capable of much more than that, of course. If the pressure capability isn't specified to be at least 300 psi, you don't want to use it on the pressure side of the regulator.

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Old 02-05-2010, 07:33 AM   #9
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1) In general, steel fittings should not be used on a predominantly copper gas piping system. They should be brass. Most machined brass fittings, in sizes likely to be used for this kind of thing are, as shown in the link, rated for higher pressures.

2) Other than the tank fittings themselves (relief valve, float gauge, valve tree, fill port), the only high pressure connection is supposed to be the pigtail from the POL to the regulator. Now, he's got a propane conversion for the engine, which should require a liquid withdrawal line. I don't think these kinds of conversions are necessarily a good idea, and if it were my rig, I'd think about disconnecting it.
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Old 02-06-2010, 04:24 PM   #10
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Hello everone, thanks for the comments so far, I might look at installing a new tank just for the motor as the current set up doesn't sound like it will meet safety standards, as for the rest of the system, I still don't have a supplier for the safety valve/80% fill.

thanks, Paul.
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Old 02-06-2010, 09:17 PM   #11
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I purchased a valve from LP Gas Relief valve 50007 [50007] - $4.95 : ODMRV , Out-of-Doors Mart
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Old 02-07-2010, 03:21 AM   #12
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Thanks fo rthe info guy99,

regards, Paul.
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Old 02-13-2010, 03:27 PM   #13
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Just ordered the parts from 'Out of doors mart' and I will disconect and blank off the supply to the motor as advised. thanks again to all of you for the great advice,

regards, Paul.
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