The Museum has a small number of these used 3/8 low pressure multi port adapters or "three way splitters" available.  They are used but work just fine.  Compare the price to new at $30.00.  Get yours while supplies last.  These are 3/8 ports, some marked DACOR.  Don't let Omar on ebay sell you one of these for 15 dollars, buy at the museum and save.

Price $10.00 each plus $4.00 shipping