Need OWB advice - heatsource 1

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jKsled

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Anybody have or used to have a heatsource 1 OWB?

House that I bought in February came with one. No manual, and company is out of business, but I found one online that looks identical : heatmor. Couple questions:

1. The cap for the water fill pipe on top of the unit is gone. Does anyone have a similar one, that can post pictures or specs, so I can make it? Apparently it's a weighted cap that holds the system to 3psi.

2. There is no expansion bladder. At all. It's just gone, and the hose leading to it is open to the air. What does the expansion bladder look like, any tips on making one from a tire tube or something?

3. There is no sand in base of unit. Can anyone confirm the heatsource 1 used sand on either side of the ash grate?
 
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