Replace shower control

The shower control in our bathroom is a Delta (presumably dating from about 30 yrs ago when the house was built) with the ball-shaped handle that turns to adjust the temperature and tilts to adjust the volume.
We thought of replacing it with a more recent Delta with a different style handle and with the built-in thermostat. I assumed that I could simply unscrew the old innards and replace them by the new innards, but the guy in the plumbing dept. at the hardware store said, "No way." He even said that we probably would not be able to replace the old innards by new innards of the same style because the design has changed over the years: the only thing to do would be to get into the wall and disconnect the whole unit and replace it with a new one.
Is he right?
MB
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Pat Keith wrote:

Yes
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Yes.
--

Christopher A. Young
Learn more about Jesus
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Sat, 17 Jul 2004 23:07:37 -0400, Minnie Bannister

Yes, he's right, but there's another thing you might want to consider. The newer mixing valves seem to have flow restrictors built in. You might not like that. I'd check to see if that is the case before changing it out.
--
Larry
Email to rapp at lmr dot com
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
L. M. Rappaport wrote:

And one more consideration - pressure balanced temperature control is worth every penny, IMO. This prevents you from freezing or scalding if someone else in the house turns on the water or flushes a toilet.
FurPaw
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Sat, 17 Jul 2004 20:07:37 -0700, Minnie Bannister wrote

Yes, he is.
I've just replaced one in a bathroom remodel. Old one was just as you describe yours to be: round-ish Delta knob with temperature and flow control. I replaced it with a new Delta single-handle type.
You might not notice until after it's installed, so I'll tell you what I found: most of the new Delta's and other brands single-handle controls now don't do any flow control, per se. They do temperature "mixing" only. In other words, they consist of one handle that rotates counter-clockwise from the off position, and when you rotate the handle, you immediately get full water flow. There is not much "a little flow, a little more", etc. The rest of the control's rotation is temperature control.
If you want flow control, you might want to consider separate valves for hot and cold.
Good luck,
--
Please, no Google links. I wouldn't ask a
question here if I hadn't done that already.
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
DaveC wrote:

I'm not the OP, but that's EXACTLY why I want to replace my shower control. This one doesn't even control the temperature well; there's a VERY TINY range between ice-cold and way-too-hot that's very hard to hit.
--
DAMN tax cuts! They're letting money trickle down to people who spend it!
WASHINGTON, July 13 (Reuters) - The U.S. government posted a larger-than-
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
DaveC wrote:

Not true about the flow control. You can get a control that does both flow and temperature control. Delta makes one that Home Depot sells (Delta 1748), Moen makes the controls with Moentrol that you have to buy at plumbing stores, American Standard sells a fairly inexpensive unit (Seva) that you can buy at Expo, and of course the German brands( Grohe, Hansgrohe) have them in many models.
And yes you have to replace the control--at some expense to get a plumber to do it, as well as possible tile repair to get at the old valve and replace it.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.