Response to Hello Jim- Unfortunately I would have to refer you to the manufacturer C-M-P because the only information I can find on this model is the unit that has the knockout plug and screw. I would suggest giving them a call at 800-733-9060.

An image is worth 1,000 words! Add an image or two to your comment to help ensure it is understood accurately.



Yes, please email me exclusive discounts, swimming pool tips and helpful how to guides. This comment may be posted on a public site. Do not include: HTML, references to other retailers, pricing, personal information, or any profane, inflammatory language.