The Lab is always seeking to improve its equipment, especially in the area of safety. For some time, we have wanted to find a smaller check valve to use when inflating hot water bottles in certain applications. Here, we have a new assembly for blowing hot water bottles remotely, including while sitting on them, that uses a small, spring-loaded check valve with a cracking pressure of 0.3PSI. This has the advantage of being able to operate in any position, and to trap air at even close to zero pressure in side the vessel. The question - does that 0.3psi threshold affect the starting pressure ...

The Lab is always seeking to improve its equipment, especially in the area of safety. For some time, we have wanted to find a smaller check valve to use when inflating hot water bottles in certain applications. Here, we have a new assembly for blowing hot water bottles remotely, including while sitting on them, that uses a small, spring-loaded check valve with a cracking pressure of 0.3PSI. This has the advantage of being able to operate in any position, and to trap air at even close to zero pressure in side the vessel. The question - does that 0.3psi threshold affect the starting pressure of a difficult test vessel? In other words, can Freya feel it in her already enormously inflated cheeks?