The shower drain has a narrow allowance between the height of the shower floor and the hard floor where the plumbing drain pipes are. Is there a smaller drain trap that doesn't have as much of a total height dimension?

Hi Tracy:

Does your trap have a cleanout on the bottom? If so, you can purchase a PTRAP without a cleanout... will save you 3/4" to 1" in total height. Otherwsie, the height of 2" PTRAPS is standard.

Back to you...

Mark

Schreime, is SureSeal approved by Code ?

Schreine I hate to rain all over your suggestion but Milo has a valid concern. You said,
you can also purchase a SureSeal at SureSeal | Inline Floor Drain Trap Sealer (http://www.thesureseal.com) instead of a p-trap
A Sure Seal, (see image) does not replace a "P"trap and I'd just love to see one of those suckers installed on a bath tub.
Here's what the sire itself had to say

Application
The Sure Seal should be utilized where a trap primer has failed or where a trap primer does not exist.

•New Construction: Used in floor drains to provide added protection against escaping sewer gases. Eliminates the need to repair/replace trap primers when they fail.
•Retrofit: Used in situations where trap primers have failed or where trap primers were never installed.

But hey!~ Your new and we welcome new members, soooo welcome to AskMeHelpDesk and the Plumbibng Page. Tom

I must have read it wrong. :) Thanks for the heads up Tom.

It is approved through the ASSE 1072 standard, however it does not seem to be approved through the UPC yet