{"id":1608,"date":"2011-03-23T07:46:03","date_gmt":"2011-03-23T12:46:03","guid":{"rendered":"http:\/\/www.summet.com\/blog\/?p=1608"},"modified":"2011-10-05T07:14:30","modified_gmt":"2011-10-05T12:14:30","slug":"building-a-pvc-vacuum-reservoir","status":"publish","type":"post","link":"https:\/\/www.summet.com\/blog\/2011\/03\/23\/building-a-pvc-vacuum-reservoir\/","title":{"rendered":"Building a PVC Vacuum Reservoir"},"content":{"rendered":"<p><a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir_painted.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir_painted-158x300.jpg\" alt=\"a foot of 3&quot; PVC pipe with end caps painted black.\" title=\"Painted Vacuum Reservoir\" width=\"158\" height=\"300\" class=\"alignleft size-medium wp-image-1609\" srcset=\"https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir_painted-158x300.jpg 158w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir_painted-541x1024.jpg 541w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir_painted.jpg 732w\" sizes=\"auto, (max-width: 158px) 100vw, 158px\" \/><\/a><br \/>\nThe <a href=\"http:\/\/www.summet.com\/blog\/2011\/02\/27\/s-10-electric-pickup\/\">electric pickup truck<\/a> uses a vacuum pump to generate vacuum for the power brakes (and move vents in the HVAC system). It has a pressure switch that turns on the pump when the vacuum drops to under 15 inHg and turns it off once the pump has raised the vacuum to 25 inHg. The current system has a small 3&#8243; by 1.5&#8243; PVC cylinder as the vacuum reservoir. As soon as you press the brake the pump turns back on, and cycles on and off relatively frequently.  I wanted a larger vacuum reservoir so that the duty cycle on the pump would be longer (it would stay on longer, but also stay off longer) and so that even when the vacuum drops to 15 inHg I could still operate the brakes several more times while the vacuum pump was working.<br \/>\n<!--more--><br \/>\n<a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/hose_bib_vacuum_gauge_connection.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/hose_bib_vacuum_gauge_connection-300x225.jpg\" alt=\"3&quot; pvc pipe cap with a hose bib and vacuum gauge connection inserted\" title=\"hose bib and vacuum gauge connections\" width=\"300\" height=\"225\" class=\"alignleft size-medium wp-image-1611\" srcset=\"https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/hose_bib_vacuum_gauge_connection-300x225.jpg 300w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/hose_bib_vacuum_gauge_connection-1024x768.jpg 1024w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/hose_bib_vacuum_gauge_connection.jpg 1600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>I used 3&#8243; PVC pipe and end caps to build the Reservoir. I screwed a 3\/8 inch hose bib (and a smaller adapter for a $25 vacuum gauge from AutoZone) into one end cap and then made sure it was air-tight by coating the inside and outside of the adapters with epoxy. After using PVC solvent and cement to attach the end caps, I also used epoxy on that joint, just in case. Spray painting it black finished the job.<br \/>\n<a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/epoxy_seal.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/epoxy_seal-225x300.jpg\" alt=\"PVC pipe and cap, with join double sealed with epoxy\" title=\"epoxy seal\" width=\"225\" height=\"300\" class=\"alignleft size-medium wp-image-1612\" srcset=\"https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/epoxy_seal-225x300.jpg 225w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/epoxy_seal-768x1024.jpg 768w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/epoxy_seal.jpg 1200w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><br \/>\n<a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir-300x225.jpg\" alt=\"Vacuum reservoir made out of PVC pipe parts\" title=\"vacuum reservoir\" width=\"300\" height=\"225\" class=\"alignright size-medium wp-image-1613\" srcset=\"https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir-300x225.jpg 300w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir-1024x768.jpg 1024w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2011\/03\/vacuum_reservoir.jpg 1600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The electric pickup truck uses a vacuum pump to generate vacuum for the power brakes (and move vents in the HVAC system). It has a pressure switch that turns on the pump when the vacuum drops to under 15 inHg &hellip; <a href=\"https:\/\/www.summet.com\/blog\/2011\/03\/23\/building-a-pvc-vacuum-reservoir\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[102],"class_list":["post-1608","post","type-post","status-publish","format-standard","hentry","category-projects","tag-etruck"],"_links":{"self":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/1608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/comments?post=1608"}],"version-history":[{"count":0,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/1608\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/media?parent=1608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/categories?post=1608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/tags?post=1608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}