A vacuum manifold features manual valves for applying vacuum or pressure to capillary-type viscometers. The designed use for a vacuum manifold pairs with the constant temperature baths. Integral brackets permit mounting on bath covers. Manifolds come in two models, one with four valves and one with three valves. Both models include a 10-foot length of rubber vacuum tubing. As well as .25″ bore x .625 OD for connection to vacuum and pressure regulators. Constructed of epoxy-coated aluminum, with an overall 13″W x 2.75″D x 9″H.