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Taztiger4 Offline
#1 Posted : Sunday, 17 September 2023 11:27:53 AM(UTC)
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Hi again

Does it matter which way the hoses are connected at the thermostat & water pump & also enter the heater ?

See the photos below, both are totally different so I assume it doesn't matter ?

Warren Turnbull Offline
#2 Posted : Sunday, 17 September 2023 4:40:23 PM(UTC)
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On HQ and HJ there is a three way tap to turn water off from the heater when not in use. HX on have two hose tap.
Dr Terry Offline
#3 Posted : Sunday, 17 September 2023 4:55:30 PM(UTC)
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HQ without a/cond has no tap, the water in the heater flows all of the time.

Because you have an HX/HZ thermostat & water pump, you will need to eliminate the short by-pass hose which runs from the thermo housing to the water pump. It is effectively 'shorting out" the heater & you will be getting virtually no flow thru the heater & no heat as a result.

The 3-way tap only applies to HQ with factory a/cond & HJ with a/cond or forced air ventilation.

Dr Terry

If at first you don't succeed, just call it Version 1.0
Taztiger4 Offline
#4 Posted : Sunday, 17 September 2023 5:30:58 PM(UTC)
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Originally Posted by: Warren Turnbull Go to Quoted Post
On HQ and HJ there is a three way tap to turn water off from the heater when not in use. HX on have two hose tap.


Thanks Warren, Mine & the 2 pics I shared dont have a tap al all.

I was going to use a 2 way on mine

Does it matter which way the hoses go ? and whilst on that, does it matter which hose the tap does go in ?
Taztiger4 Offline
#5 Posted : Sunday, 17 September 2023 5:34:31 PM(UTC)
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Originally Posted by: Dr Terry Go to Quoted Post
HQ without a/cond has no tap, the water in the heater flows all of the time.

Because you have an HX/HZ thermostat & water pump, you will need to eliminate the short by-pass hose which runs from the thermo housing to the water pump. It is effectively 'shorting out" the heater & you will be getting virtually no flow thru the heater & no heat as a result.

The 3-way tap only applies to HQ with factory a/cond & HJ with a/cond or forced air ventilation.

Dr Terry



Thanks Dr Terry

So you are talking about the short hose in the pics I posted ?, how do I plumb the hoses without it ? or do I need to go to HQ water pump & single spigot thermostat ?

Cheers

Dr Terry Offline
#6 Posted : Sunday, 17 September 2023 6:19:23 PM(UTC)
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Originally Posted by: Taztiger4 Go to Quoted Post


Thanks Dr Terry

So you are talking about the short hose in the pics I posted ?, how do I plumb the hoses without it ? or do I need to go to HQ water pump & single spigot thermostat ?

Cheers



Pre-HX water pumps have been NLA for decades. There are 2 methods to block off the water hose.

You can buy 2 block- off caps (Mackay P/No. BC16) & cap off both fittings, eliminating the hose.

Another method is that some water pumps have one of the outlets is threaded & suppled with a block plug when new, so they can be fitted to HQ/HJ etc.

If your pump is threaded screw in a plug & refit the hose.

Dr Terry
If at first you don't succeed, just call it Version 1.0
 1 user thanked Dr Terry for this useful post.
Taztiger4 on 17/09/2023(UTC)
Taztiger4 Offline
#7 Posted : Sunday, 17 September 2023 7:19:38 PM(UTC)
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Originally Posted by: Dr Terry Go to Quoted Post
Originally Posted by: Taztiger4 Go to Quoted Post


Thanks Dr Terry

So you are talking about the short hose in the pics I posted ?, how do I plumb the hoses without it ? or do I need to go to HQ water pump & single spigot thermostat ?

Cheers



Pre-HX water pumps have been NLA for decades. There are 2 methods to block off the water hose.

You can buy 2 block- off caps (Mackay P/No. BC16) & cap off both fittings, eliminating the hose.

Another method is that some water pumps have one of the outlets is threaded & suppled with a block plug when new, so they can be fitted to HQ/HJ etc.

If your pump is threaded screw in a plug & refit the hose.

Dr Terry


Cheers , so just remove that short pipe & use the 2 block- off caps ?

or block off the water pipe outlet with the block plug & use the single spigot thermostat housing ?

Edited by user Sunday, 17 September 2023 7:25:09 PM(UTC)  | Reason: Not specified

Dr Terry Offline
#8 Posted : Sunday, 17 September 2023 7:23:57 PM(UTC)
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Yep.

Dr Terry
If at first you don't succeed, just call it Version 1.0
 1 user thanked Dr Terry for this useful post.
Taztiger4 on 17/09/2023(UTC)
PirLPe Offline
#9 Posted : Tuesday, 19 September 2023 6:07:58 PM(UTC)
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Originally Posted by: Dr Terry Go to Quoted Post
Originally Posted by: Taztiger4 Go to Quoted Post


Thanks Dr Terry

So you are talking about the short hose in the pics I posted ?, how do I plumb the hoses without it ? or do I need to go to HQ water pump & single spigot thermostat ?

Cheers



Pre-HX water pumps have been NLA for decades. There are 2 methods to block off the water hose.

You can buy 2 block- off caps (Mackay P/No. BC16) & cap off both fittings, eliminating the hose.

Another method is that some water pumps have one of the outlets is threaded & suppled with a block plug when new, so they can be fitted to HQ/HJ etc.

If your pump is threaded screw in a plug & refit the hose.

Dr Terry


It's easier than I thought. Thank you.
Taztiger4 Offline
#10 Posted : Wednesday, 20 September 2023 10:50:18 PM(UTC)
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Is there actually any point to doing this with the 2 5/8 hoses from pump to thermostat ?, would be neater & easier to block all 4 ports with the BC16 blanking caps Dr Terry suggested


Edited by user Wednesday, 20 September 2023 10:51:01 PM(UTC)  | Reason: Not specified

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