Hello Old House,
Thank you for your question regarding the Delta In2ition® 4-Setting Two-in-One Shower and I am happy to help you today.
You can try to soak the full shower head, hand shower and hose in a solution of 50/50 white vinegar and water or up to 75/25 white vinegar and water for a few hours or overnight if need be. After soaking the unit, flush out the shower head, wand and hose with warm water for a few minutes before using to see if this makes an improvement. Unfortunately, there is no way to take the shower head apart as you may run the risk of damaging the shower head and I apologize for the inconvenience.
Generally, you may experience a lowered flow rate at around 40 PSI and the maximum flow will gradually decrease as the pressure goes down, which is dependent on the overall flow rate of the shower head.
I hope this improves the flow of your model and please feel free to give us a call if we can assist you with anything going forward at 800-345-3358.
Date published: 2018-04-11